Far-field voice control circuit and device

Abstract

The utility model discloses a far-field voice control circuit and device, relates to the technical field of far-field voice, and discloses a far-field voice control circuit, which comprises a switch chip sub-circuit and a mechanical switch, the first end of the mainboard control chip is connected with the output end of the switch chip sub-circuit; the first end of the microphone control sub-circuit is connected with the mechanical switch, the second end of the microphone control sub-circuit is connected with the control end of the switch chip sub-circuit, and the third end of the microphone control sub-circuit is connected with the second end of the mainboard control chip. The microphone control sub-circuit is used for controlling the switch chip sub-circuit to disconnect with the mainboard control chip based on the mechanical switch. According to the invention, the accuracy of far-field voice control is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of far-field voice, and particularly relates to a far-field voice control circuit and device. BACKGROUND

[0002] With the application of far-field voice technology in different fields being more and more extensive, users also put forward higher requirements for the control of far-field voice.

[0003] The traditional control mode of far-field voice is to directly disconnect the MIC (Microphone) DATA signal of the microphone in the far-field voice system from the physical layer through a mechanical switch. This control mode of far-field voice has great defects, and there is a phenomenon that human body static interference exists when the mechanical switch is turned off, which affects the accuracy of far-field voice control (that is, affects the normal work of far-field voice). Therefore, a new control mode of far-field voice is urgently needed to ensure the accuracy of far-field voice control.

[0004] The above content is only used to assist in understanding the technical solutions of the present application and does not represent the acknowledgement of the above content as prior art. CONTENT OF THE UTILITY MODEL

[0005] The main purpose of the present application is to provide a far-field voice control circuit and device, and to provide a new control mode of far-field voice to ensure the accuracy of far-field voice control.

[0006] To achieve the above purpose, the present application provides a far-field voice control circuit, which comprises:

[0007] a switch chip subcircuit and a mechanical switch;

[0008] a mainboard control chip, a first end of the mainboard control chip being connected with an output end of the switch chip subcircuit;

[0009] a microphone control subcircuit, a first end of the microphone control subcircuit being connected with the mechanical switch, a second end of the microphone control subcircuit being connected with a control end of the switch chip subcircuit, a third end of the microphone control subcircuit being connected with a second end of the mainboard control chip, and the microphone control subcircuit being used for controlling the switch chip subcircuit to disconnect the connection with the mainboard control chip based on the mechanical switch.

[0010] In an embodiment, the switch chip subcircuit comprises:

[0011] a microphone chip;

[0012] a switch chip, a third end of the switch chip, a fourth end of the switch chip, a fifth end of the switch chip and a seventh end of the switch chip are grounded, a second end of the switch chip is connected with the microphone chip, a sixth end of the switch chip is connected with a first end of the mainboard control chip;

[0013] a first resistance, a first end of the first resistance is connected with a second end of the microphone control sub-circuit, a second end of the first resistance is connected with a first end of the switch chip;

[0014] a first capacitance, a first end of the first capacitance is grounded, a second end of the first capacitance is connected with a first end of the switch chip;

[0015] a second capacitance, a first end of the second capacitance is connected with a first power supply and an eighth end of the switch chip, a second end of the second capacitance is grounded;

[0016] a third capacitance, a first end of the third capacitance is connected with the first power supply and the eighth end of the switch chip, a second end of the third capacitance is grounded.

[0017] In an embodiment, the microphone control sub-circuit comprises a switch input unit and a switch output unit, the mechanical switch, the switch input unit, the switch output unit and a second end of the mainboard control chip are connected in sequence, the switch input unit is further connected with a first end of the first resistance, the mechanical switch comprises a first output end and a second output end, the switch input unit comprises:

[0018] a first transient diode, a first end of the first transient diode is connected with the first output end of the mechanical switch, a second end of the first transient diode is connected with the second output end of the mechanical switch and then grounded;

[0019] a second resistance, a first end of the second resistance is connected with the first power supply, a second end of the second resistance is connected with the first output end of the mechanical switch and the first end of the first resistance;

[0020] a third resistance, a first end of the third resistance is connected with the first output end of the mechanical switch, a second end of the third resistance is connected with the switch output unit;

[0021] a fourth capacitance, a first end of the fourth capacitance is connected with the second end of the third resistance, a second end of the fourth capacitance is grounded.

[0022] In an embodiment, when the mechanical switch is a vertical toggle switch, the first end of the vertical toggle switch and the sixth end of the vertical toggle switch are connected as the second output end, and the second end of the vertical toggle switch and the fifth end of the vertical toggle switch are connected as the first output end.

[0023] When the mechanical switch is a horizontal toggle switch, the first end of the horizontal toggle switch and the fifth end of the horizontal toggle switch are connected as the second output end, and the second end of the horizontal toggle switch is the first output end.

[0024] In an embodiment, the switch output unit comprises:

[0025] A fourth resistor, a first end of the fourth resistor is connected with a second end of the third resistor, and a second end of the fourth resistor is connected with a second end of the mainboard control chip;

[0026] A fifth resistor, a first end of the fifth resistor is connected with a first end of the fourth resistor;

[0027] A sixth resistor, a first end of the sixth resistor is connected with the first power supply, and a second end of the sixth resistor is connected with the second end of the mainboard control chip;

[0028] A switch tube, a third end of the switch tube is connected with a second end of the fifth resistor, a first end of the switch tube is connected with the second end of the mainboard control chip, and a second end of the switch tube is grounded.

[0029] In an embodiment, the far-field voice control circuit comprises a key sub-circuit and a display sub-circuit, the key sub-circuit and the display sub-circuit are connected with the mainboard control chip respectively, and the key sub-circuit comprises:

[0030] A key switch, a first end of the key switch and a second end of the key switch are connected and grounded;

[0031] A second transient diode, a first end of the second transient diode is connected with a third end of the key switch and a fourth end of the key switch, and a second end of the second transient diode is grounded;

[0032] A seventh resistor, a first end of the seventh resistor is connected with the first end of the second transient diode, and a second end of the seventh resistor is connected with a third end of the mainboard control chip;

[0033] A fifth capacitor, a first end of the fifth capacitor is connected with the second end of the seventh resistor, and a second end of the fifth capacitor is grounded;

[0034] The display sub-circuit comprises:

[0035] an eighth resistor, a first end of the eighth resistor being connected with the second power supply, a second end of the eighth resistor being connected with the mainboard control chip;

[0036] a ninth resistor, a first end of the ninth resistor being connected with the second power supply;

[0037] a light emitting device, a first end of the light emitting device being connected with the second end of the eighth resistor, a second end of the light emitting device being grounded, a third end of the light emitting device being connected with the second end of the ninth resistor, a fourth end of the light emitting device being connected with the fourth end of the mainboard control chip.

[0038] In an embodiment, the far-field voice control circuit comprises an infrared input sub-circuit, the infrared input sub-circuit being connected with the mainboard control chip, the infrared input sub-circuit comprising:

[0039] an infrared sensor, a first end of the infrared sensor being connected with a fourth end of the infrared sensor and then being grounded;

[0040] a sixth capacitor, a first end of the sixth capacitor being connected with a second end of the infrared sensor, a second end of the sixth capacitor being grounded;

[0041] a tenth resistor, a first end of the tenth resistor being connected with the first end of the sixth capacitor, a second end of the tenth resistor being connected with the third end of the infrared sensor and the mainboard control chip;

[0042] an eleventh resistor, a first end of the eleventh resistor being connected with the first end of the sixth capacitor, a second end of the eleventh resistor being connected with the second power supply;

[0043] a third transient diode, a first end of the third transient diode being connected with the mainboard control chip, a second end of the third transient diode being grounded;

[0044] a seventh capacitor, a first end of the seventh capacitor being connected with the second power supply, a second end of the seventh capacitor being grounded;

[0045] an eighth capacitor, a first end of the eighth capacitor being connected with the second power supply, a second end of the eighth capacitor being grounded.

[0046] In an embodiment, the far-field voice control circuit comprises a connector and a plurality of connection lines, the first end of the mainboard control chip and the output end of the switch chip sub-circuit, the first end of the microphone control sub-circuit and the mechanical switch, the second end of the microphone control sub-circuit and the control end of the switch chip sub-circuit, and the third end of the microphone control sub-circuit and the second end of the mainboard control chip being connected through the connector and the connection lines.

[0047] In addition, in order to achieve the above-mentioned purpose, the application further provides a far-field voice control device, which comprises the above-mentioned far-field voice control circuit.

[0048] In an embodiment, the far-field voice control device comprises a microphone board and a plurality of main boards, the microphone control sub-circuit is arranged on the microphone board, the main board control chip is arranged on one of the main boards, and the switch chip sub-circuit and the mechanical switch are arranged on another one of the main boards or,

[0049] The microphone control sub-circuit, the switch chip sub-circuit and the mechanical switch are arranged on the microphone board, and the main board control chip is arranged on the main board.

[0050] The application provides a far-field voice control circuit, which comprises a switch chip sub-circuit and a mechanical switch, a main board control chip, a first end of the main board control chip being connected with an output end of the switch chip sub-circuit, a microphone control sub-circuit, a first end of the microphone control sub-circuit being connected with the mechanical switch, a second end of the microphone control sub-circuit being connected with a control end of the switch chip sub-circuit, and a third end of the microphone control sub-circuit being connected with a second end of the main board control chip, the microphone control sub-circuit being used for controlling the switch chip sub-circuit to disconnect with the main board control chip based on the mechanical switch. The far-field voice control circuit is connected with the mechanical switch through the first end of the microphone control sub-circuit, is connected with the control end of the switch chip sub-circuit through the second end of the microphone control sub-circuit, is connected with the second end of the main board control chip through the third end of the microphone control sub-circuit, and is connected with the output end of the switch chip sub-circuit through the first end of the main board control chip, so that the switch chip sub-circuit can be controlled to disconnect with the main board control chip based on the mechanical switch, the DATA signal of the microphone in the far-field voice system is disconnected, and the phenomenon that the accuracy of the far-field voice control is affected by the human body static electricity interference when the mechanical switch is turned off (i.e. the normal work of the far-field voice is affected) is avoided. The far-field voice control circuit can disconnect the DATA signal of the microphone in the far-field voice system through the above connection and control mode, and the accuracy of the far-field voice control is ensured by indirectly controlling the switch chip sub-circuit through the mechanical switch when the mechanical switch is directly turned off. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 FIG. 1 is a schematic diagram of a framework of a first embodiment of the far-field voice control circuit of the application;

[0052] Figure 2 FIG. 4 is a connection diagram of a switch chip sub-circuit in the far-field voice control circuit of the application;

[0053] Figure 3A connection diagram of a switch input unit in the far-field voice control circuit of the application;

[0054] Figure 4 A physical diagram of a toggle switch in the far-field voice control circuit of the application;

[0055] Figure 5 A connection diagram of a switch output unit in the far-field voice control circuit of the application;

[0056] Figure 6 A connection diagram of a microphone control sub-circuit in the far-field voice control circuit of the application;

[0057] Figure 7 Another connection diagram of a microphone control sub-circuit in the far-field voice control circuit of the application;

[0058] Figure 8 A connection diagram of a key sub-circuit in the far-field voice control circuit of the application;

[0059] Figure 9 A connection diagram of a display sub-circuit in the far-field voice control circuit of the application;

[0060] Figure 10 A connection diagram of an infrared input sub-circuit in the far-field voice control circuit of the application;

[0061] Figure 11 A connection diagram of a first embodiment of a connector in the far-field voice control circuit of the application;

[0062] Figure 12 A connection diagram of a second embodiment of a connector in the far-field voice control circuit of the application;

[0063] Figure 13 A connection diagram of a third embodiment of a connector in the far-field voice control circuit of the application;

[0064] Figure 14 A connection diagram of the far-field voice control device of the application;

[0065] Figure 15 Another connection diagram of the far-field voice control device of the application.

[0066] The implementation, functional features and advantages of the application will be further described with reference to the embodiments and the accompanying drawings.

[0067] Explanation of the reference signs:

[0068] 10, switch chip subcircuit; 20, mechanical switch; 30, mainboard control chip; 40, microphone control subcircuit; VCC1, first power supply; R1, first resistor; C1, first capacitor; C2, second capacitor; C3, third capacitor; U0, switch chip; OE2, first end of switch chip; A1, second end of switch chip; Y2, third end of switch chip; GND, fourth end of switch chip; A2, fifth end of switch chip; Y1, sixth end of switch chip; OE1, seventh end of switch chip; VCC, eighth end of switch chip; SDIO, microphone data signal; BACK, microphone return signal; SW1, vertical toggle switch; SW2, horizontal toggle switch; E1, first transient diode; RV, pressure sensitive resistor;

[0069] R2, second resistor; R3, third resistor; C4, fourth capacitor; A, pin; B, shell; C, shell; D, code; R4, fourth resistor; R5, fifth resistor; R6, sixth resistor; Q1, switch tube; MUTE, first switch signal; 41, switch input unit; 42, switch output unit; S1, key switch; R7, seventh resistor; C5, fifth capacitor; E2, second transient diode; KEY, second switch signal; VCC2, second power supply; R8, eighth resistor; R9, ninth resistor; D1, first light emitting diode; D2, second light emitting diode; LED, display signal; MO, infrared sensor; VS, second end of infrared sensor; OUT, third end of infrared sensor; C6, sixth capacitor; R10, tenth resistor; R11, eleventh resistor; C7, seventh capacitor; C8, eighth capacitor; IR, infrared signal; E3, third transient diode; P1, first connector; P2, second connector; C9, ninth capacitor; R12, twelfth resistor; R13, thirteenth resistor; C10, tenth capacitor; C11, eleventh capacitor; C12, twelfth capacitor; R14, fourteenth resistor; D3, first diode; D4, second diode; D5, third diode; D6, fourth diode; D7, fifth diode; E4, fourth transient diode; E5, fifth transient diode; E6, sixth transient diode; E7, seventh transient diode; E8, eighth transient diode; 110, mainboard; 120, microphone board; 130, key / voice switch board; 140, receiving / indicating board; 150, receiving / indicating / key board; SCLK, clock signal; D, light emitting device. DETAILED DESCRIPTION

[0070] It should be understood that the specific embodiments described herein are merely exemplary and not intended to limit the application.

[0071] In order to better understand the technical solutions of the present application, the following will be described in detail in combination with the drawings of the specification and specific embodiments.

[0072] All the devices supporting far-field voice on the market currently require that the MIC DATA signal of all microphones in the far-field voice system can be physically disconnected using a mechanical switch to ensure user privacy. If only a physical switch is used to disconnect the MIC DATA signal at the physical layer, the signal quality cannot be guaranteed, and the system may be damaged due to human body static electricity brought by the user when contacting the mechanical switch, so that the accuracy of far-field voice control is difficult to guarantee.

[0073] Therefore, based on the deficiencies of the above far-field voice control mode, the far-field voice control circuit of the present application is proposed: the first end of the microphone control subcircuit is connected with the mechanical switch, the second end of the microphone control subcircuit is connected with the control end of the switch chip subcircuit, and the third end of the microphone control subcircuit is connected with the second end of the mainboard control chip, while the first end of the mainboard control chip is connected with the output end of the switch chip subcircuit, and then the mechanical switch can be used to control the switch chip subcircuit to disconnect the connection with the mainboard control chip to disconnect the DATA signal of the microphone in the far-field voice system, thereby avoiding the phenomenon that the accuracy of far-field voice control is affected by human body static electricity interference when the mechanical switch is turned off (i.e. affecting the normal work of far-field voice), and the far-field voice control circuit can disconnect the DATA signal of the microphone in the far-field voice system by using the mechanical switch to turn off directly, and the human body static electricity interference is avoided by indirectly controlling the switch chip subcircuit through the mechanical switch, thereby ensuring the accuracy of far-field voice control.

[0074] Based on this, the embodiment of the present application provides a far-field voice control circuit, which refers to Figure 1 , Figure 1 The figure is a schematic diagram of the framework of the first embodiment of the far-field voice control circuit of the present application.

[0075] Referring to Figure 1 , the present application provides a far-field voice control circuit, which comprises:

[0076] a switch chip subcircuit 10 and a mechanical switch 20;

[0077] a mainboard control chip 30, the first end of the mainboard control chip 30 being connected with the output end of the switch chip subcircuit 10;

[0078] a microphone control subcircuit 40, the first end of the microphone control subcircuit 40 being connected with the mechanical switch 20, the second end of the microphone control subcircuit 40 being connected with the control end of the switch chip subcircuit 10, the third end of the microphone control subcircuit 40 being connected with the second end of the mainboard control chip 30, and the microphone control subcircuit 40 being used to control the switch chip subcircuit 10 to disconnect the connection with the mainboard control chip 30 based on the mechanical switch 20.

[0079] In the embodiment, the switch chip subcircuit 10 is based on the microphone input microphone signal, and the first end of the mainboard control chip 30 is connected with the output end of the switch chip subcircuit 10 to realize the control of the switch chip subcircuit 10, so that the collected MIC DATA signal is normally transmitted to the mainboard control chip 30. At the same time, the first end of the microphone control subcircuit 40 is connected with the mechanical switch 20, and the second end of the microphone control subcircuit is connected with the control end of the switch chip subcircuit 10. At this time, based on the different states of the mechanical switch 20, such as the open state and the closed state, the microphone control subcircuit 40 can input the high and low levels corresponding to the different states of the mechanical switch 20 to the control end of the switch chip subcircuit 10. At this time, the control end of the switch chip subcircuit 10 will control the switch chip subcircuit 10 to conduct based on the high and low levels input by the control end itself. When conducting, the input end of the switch chip subcircuit 10 is connected with the output end of the switch chip subcircuit 10 (the input and output are relative to the direction of the microphone signal), that is, the MIC DATA signal collected by the microphone chip is normally transmitted to the first end of the mainboard control chip 30 through the switch chip subcircuit 10. When not conducting, the input end of the switch chip subcircuit 10 is disconnected with the output end of the switch chip subcircuit 10, that is, the MIC DATA signal collected by the microphone chip cannot be transmitted to the first end of the mainboard control chip 30. Here, the first end of the mainboard control chip refers to the port for receiving the MIC DATA signal, and the second end of the mainboard control chip refers to the port for receiving the signal of the microphone control subcircuit. When the input end of the switch chip subcircuit 10 is disconnected with the output end of the switch chip subcircuit 10, the port signal is low. Further, when the mechanical switch 20 is in the open state, a high level is input to the control end of the switch chip subcircuit 10, and the input end of the switch chip subcircuit 10 is disconnected with the output end of the switch chip subcircuit 10. When the mechanical switch 20 is in the closed state, a low level is input to the control end of the switch chip subcircuit 10, and the input end of the switch chip subcircuit 10 is connected with the output end of the switch chip subcircuit 10. This can avoid the situation that the user directly operates the mechanical switch 20 to directly control the transmission of the MIC DATA signal, and can reduce the risk of human body static interference when the mechanical switch is turned off, thereby ensuring the accuracy of the far-field voice control.

[0080] In an embodiment, the mechanical switch 20 can be a commonly used dial or key switch, the switch chip subcircuit 10 can be a commonly used selection control chip, the working principle is to turn on or turn off different ports by inputting different signals, such as a commonly used two-way selection chip, the mainboard control chip 30 can select a commonly used MCU (Microcontroller Unit) chip, a DSP (Digital Signal Processor) chip, a TV SoC, etc., the first end, the second end, etc. of the mainboard control chip 30 can be set by defining the functions of different ports, which are not limited here. At this time, only by burning the relevant control program and defining the connection object of the relevant port in the mainboard control chip 30, the functions of each port and the function of far-field voice processing can be realized.

[0081] In the embodiment, a far-field voice control circuit is provided, which includes a switch chip subcircuit and a mechanical switch; a mainboard control chip, a first end of the mainboard control chip being connected with an output end of the switch chip subcircuit; a microphone control subcircuit, a first end of the microphone control subcircuit being connected with the mechanical switch, a second end of the microphone control subcircuit being connected with a control end of the switch chip subcircuit, and a third end of the microphone control subcircuit being connected with a second end of the mainboard control chip, the microphone control subcircuit being used for controlling the switch chip subcircuit to disconnect with the mainboard control chip based on the mechanical switch. The far-field voice control circuit connects the first end of the microphone control subcircuit with the mechanical switch, connects the second end of the microphone control subcircuit with the control end of the switch chip subcircuit, and connects the third end of the microphone control subcircuit with the second end of the mainboard control chip, and then the first end of the mainboard control chip is connected with the output end of the switch chip subcircuit, so as to control the switch chip subcircuit to disconnect with the mainboard control chip based on the mechanical switch, to disconnect the DATA signal of the microphone in the far-field voice system, thereby avoiding the phenomenon that the accuracy of the far-field voice control is affected (i.e. affecting the normal work of the far-field voice) when the mechanical switch is turned off due to the human body static electricity interference. The far-field voice control circuit can disconnect the DATA signal of the microphone in the far-field voice system by using the above connection and control mode, and directly uses the mechanical switch to turn off, which exists human body static electricity interference, to indirectly control the switch chip subcircuit through the mechanical switch, thereby ensuring the accuracy of the far-field voice control.

[0082] Further, based on the first embodiment of the present application, the second embodiment of the far-field voice control circuit of the present application is proposed, referring to Figure 2 , Figure 2 is a connection diagram of the switch chip subcircuit in the far-field voice control circuit of the present application, the switch chip subcircuit 10 includes:

[0083] The microphone chip is used for collecting the MIC DATA signal and transmitting the MIC DATA signal to the first end of the mainboard control chip 30 through the switch chip U0.

[0084] The third end Y2 of the switch chip U0, the fourth end GND of the switch chip U0, the fifth end A2 of the switch chip U0 and the seventh end OE1 of the switch chip U0 are grounded, the second end A1 of the switch chip U0 is connected with the microphone chip (for receiving the MIC DATA signal), and the sixth end Y1 of the switch chip U0 is connected with the first end of the mainboard control chip 30 (for transmitting the MIC DATA signal).

[0085] The first resistor R1 has the first end connected with the second end of the microphone control subcircuit 40 and the second end connected with the first end OE2 of the switch chip U0.

[0086] The first capacitor C1 has the first end grounded and the second end connected with the first end OE2 of the switch chip U0.

[0087] The second capacitor C2 has the first end connected with the first power supply VCC1 and the eighth end VCC of the switch chip U0 and the second end grounded.

[0088] The third capacitor C3 has the first end connected with the first power supply VCC1 and the eighth end VCC of the switch chip U0 and the second end grounded.

[0089] In the embodiment, the microphone data signal SDIO and the microphone return signal BACK of the switch chip U0 can be output and transmitted between the switch chip subcircuit 10 and the mainboard control chip 30, wherein the microphone data signal SDIO and the microphone return signal BACK can be used for transmitting the MIC DATA signal, that is, the opening and closing of the switch chip U0 can be controlled, the microphone data signal SDIO is transmitted to the mainboard control chip 30 or disconnected with the mainboard control chip 30, that is, the microphone data signal SDIO cannot be transmitted to the mainboard control chip 30. It is worth mentioning that a resistor can be used to connect between the microphone data signal SDIO and the microphone return signal BACK to be compatible with the design of the switch subcircuit on the mainboard, and the above is only one connection mode of the switch chip subcircuit 10, and other connection modes can also be used. The switch chip U0 can be a commonly used switch chip, which is not limited here, such as Figure 2 As shown in Figure 2 Each end of the switch chip U0 corresponds to the digital label of the switch chip U0 in , and the digital labels of other chips or ports in the subsequent description also have the same meaning, which will not be described one by one.

[0090] In an embodiment, the microphone control sub-circuit 40 comprises a switch input unit 41 and a switch output unit 42, the mechanical switch 20, the switch input unit 41, the switch output unit 42 and the second end of the mainboard control chip 30 are sequentially connected, the switch input unit 41 is further connected with the first end of the first resistor R1, the mechanical switch 20 comprises a first output end and a second output end, for reference Figure 3 , Figure 3 The connection diagram of the switch input unit in the far-field voice control circuit of the present application is shown in FIG. 2. The switch input unit 41 comprises:

[0091] a first transient diode E1, the first end of the first transient diode E1 is connected with the first output end of the mechanical switch 20, the second end of the first transient diode E1 is connected with the second output end of the mechanical switch 20 and then grounded;

[0092] a second resistor R2, the first end of the second resistor R2 is connected with the first power supply VCC1, the second end of the second resistor R2 is connected with the first output end of the mechanical switch 20 and the first end of the first resistor R1;

[0093] a third resistor R3, the first end of the third resistor R3 is connected with the first output end of the mechanical switch 20, the second end of the third resistor R3 is connected with the switch output unit 42;

[0094] a fourth capacitor C4, the first end of the fourth capacitor C4 is connected with the second end of the third resistor R3, the second end of the fourth capacitor C4 is grounded.

[0095] Further, when the mechanical switch 20 is a vertical toggle switch SW1, the first end of the vertical toggle switch SW1 is connected with the sixth end of the vertical toggle switch SW1 and then serves as the second output end, the second end of the vertical toggle switch SW1 is connected with the fifth end of the vertical toggle switch SW1 and then serves as the first output end;

[0096] When the mechanical switch 20 is a horizontal toggle switch SW2, the first end of the horizontal toggle switch SW2 is connected with the fifth end of the horizontal toggle switch SW2 and then serves as the second output end, the second end of the horizontal toggle switch SW2 serves as the first output end.

[0097] In the embodiment, the microphone control sub-circuit 40 is composed of a switch input unit 41 and a switch output unit 42, wherein the switch input unit 41 and the switch output unit 42 mainly realize the control of the on and off states of the switch chip sub-circuit 10 by different states of the mechanical switch 20, and the switch chip sub-circuit 10 is used to transmit the MIC DATA signal collected by the microphone to the mainboard control chip 30. At this time, the transmission or non-transmission of the MIC DATA signal to the mainboard control chip 30 can be controlled based on the mechanical switch 20, so as to avoid the influence of static electricity when the mechanical switch 20 is operated. The function of the switch input unit 41 is to output different voltages to the switch output unit 42 based on different states of the mechanical switch 20. On the one hand, the on and off of the switch chip U0 in the switch chip sub-circuit 10 is controlled based on the output voltage of the switch input unit 41. On the other hand, the on and off states of the switch chip sub-circuit 10 at this time are informed to the mainboard control chip 30 based on the output level of the switch output unit 42. In the circuit, the first transient diode E1 and the voltage-dependent resistor RV (a voltage-dependent resistor RV can be connected in parallel across the first transient diode E1) are used to avoid the interference of transient current, so as to ensure the input accuracy of the circuit. In the circuit, Figure 3 The switch input unit 41 is only a feasible embodiment, and other circuits can also be used instead, as long as different states of the mechanical switch 20 can output different levels to the switch output unit 42 and the switch chip sub-circuit 10. Further, the mechanical switch 20 can be a vertical toggle switch SW1 or a horizontal toggle switch SW2 (wherein the internal 1 and 6, 2 and 5 are in conduction). It is worth noting that the toggle switch is a gating switch, single-pole double-throw, the middle is a single-pole, the two ends are the gating ends of a single-pole, one end is suspended, and the other end is GND. The two switch logics are consistent, and the difference is the difference between the horizontal and vertical. Please refer to Figure 4 , Figure 4 Fig. 1 is a physical schematic diagram of the toggle switch in the far-field voice control circuit of the present application. In the figure, it is a horizontal toggle switch SW2, A is the pin of the horizontal toggle switch SW2, B is the position in the shell of the horizontal toggle switch SW2, C is the shell of the horizontal toggle switch SW2, and D is the movable dial on the horizontal toggle switch SW2. Of course, other switches such as a key switch can also be used, which is not limited here.

[0098] In an embodiment, please refer to Figure 5 , Figure 5 Fig. 2 is a connection schematic diagram of the switch output unit in the far-field voice control circuit of the present application. The switch output unit 42 includes:

[0099] A fourth resistor R4, a first end of the fourth resistor R4 is connected with a second end of the third resistor R3 in the switch input unit 41, and a second end of the fourth resistor R4 is connected with a second end of the mainboard control chip 30;

[0100] The fifth resistor R5, the first end of the fifth resistor R5 is connected with the first end of the fourth resistor R4;

[0101] The sixth resistor R6, the first end of the sixth resistor R6 is connected with the first power supply VCC1, the second end of the sixth resistor R6 is connected with the second end of the mainboard control chip 30;

[0102] The switch tube Q1, the third end of the switch tube Q1 is connected with the second end of the fifth resistor R5, the first end of the switch tube Q1 is connected with the second end of the mainboard control chip 30, the second end of the switch tube Q1 is grounded.

[0103] In the embodiment, the switch output unit 42 is used for outputting different levels to the second end of the mainboard control chip 30, so as to realize that the mainboard control chip 30 knows the state (connected or disconnected) of the switch chip subcircuit 10 at this time. Because the function of the switch output unit 42 is the inverse function, at this time, the level of the switch input unit 41 can also be directly outputted, and only the definition logic inside the mainboard control chip 30 needs to be changed, that is, the fourth resistor R4 is directly used to output the first switch signal MUTE. It is worth noting that the switch output unit 42 outputs the first switch signal MUTE, which returns the state of the far-field voice switch to the mainboard control chip 30, and then the on-off state of the far-field voice can be displayed to the user (for example, when the far-field voice is turned on, the mainboard control chip 30 controls the red light to turn on, and when the far-field voice is turned off, the mainboard control chip 30 controls the yellow light to turn on). For details, please refer to Figure 6 , Figure 6 The connection diagram of the microphone control subcircuit in the far-field voice control circuit of the present application is shown in the figure. The microphone control subcircuit 40 can be composed in the above manner, and the above is one composition of the microphone control subcircuit 40, which is not limited to all compositions of the microphone control subcircuit 40. At this time, only the function of the microphone to collect the MIC DATA signal needs to be ensured, and the switch input unit 41 mainly realizes the control of the on-off state of the switch chip subcircuit 10 by the different states of the mechanical switch 20 and the output of the switch chip subcircuit 10. For details, please refer to Figure 7 , Figure 7For another connection diagram of the microphone control subcircuit in the far-field voice control circuit of the present application, a vertical toggle switch SW1 is replaced by a horizontal toggle switch SW2 in the diagram, which is a 90-degree horizontal toggle SMT (Surface Mounted Technology) switch mounted on the back of the PCB (Printed Circuit Board), and the toggle lever is parallel to the PCB surface. It is worth noting that a resistor R can be arranged between the microphone data signal SDIO and the microphone return signal BACK to short-circuit them, so that the switch chip subcircuit 10 can be moved to the mainboard 100 end to reduce the PCB area of the microphone board 120.

[0104] Further, based on the first embodiment and / or the second embodiment of the present application described above, a third embodiment of the far-field voice control circuit of the present application is proposed, which includes a key subcircuit and a display subcircuit, and the key subcircuit and the display subcircuit are respectively connected with the mainboard control chip 30. Referring to Figure 8 , Figure 8 For a connection diagram of the key subcircuit in the far-field voice control circuit of the present application, the key subcircuit includes:

[0105] The first end of the key switch S1 and the second end of the key switch S1 are connected and grounded;

[0106] The first end of the second transient diode E2 is connected with the third end of the key switch S1 and the fourth end of the key switch S1, and the second end of the second transient diode E2 is grounded;

[0107] The first end of the seventh resistor R7 is connected with the first end of the second transient diode, and the second end of the seventh resistor R7 is connected with the third end of the mainboard control chip 30;

[0108] The first end of the fifth capacitor C5 is connected with the second end of the seventh resistor R7, and the second end of the fifth capacitor C5 is grounded;

[0109] Referring to Figure 9 , Figure 9 For a connection diagram of the display subcircuit in the far-field voice control circuit of the present application, the display subcircuit includes:

[0110] The first end of the eighth resistor R8 is connected with the second power supply VCC2, and the second end of the eighth resistor R8 is connected with the mainboard control chip 30;

[0111] The first end of the ninth resistor R9 is connected with the second power supply VCC2;

[0112] The first end of the light emitting device D is connected with the second end of the eighth resistor R8, the second end of the light emitting device D is grounded, the third end of the light emitting device D is connected with the second end of the ninth resistor R9, and the fourth end of the light emitting device D is connected with the fourth end of the mainboard control chip 30.

[0113] In the embodiment, the far-field voice control circuit includes a key sub-circuit and a display sub-circuit. The key sub-circuit is used to control the start of the whole machine device circuit. For example, when the key switch S1 is not pressed, the second switch signal KEY is high; when the key switch S1 is pressed, the second switch signal KEY is low. The above is only one example of the circuit connection of the key sub-circuit. The second switch signal KEY can be directly controlled by the mainboard control chip 30 without passing through the switch chip sub-circuit 10. The display sub-circuit can also be directly controlled by the mainboard control chip 30 without passing through the switch chip sub-circuit 10. The main purpose is to control the display of the light emitting device D. The light emitting device D can be an integrated device with the first light emitting diode D1 and the second light emitting diode D2 designed internally. The control logic is that when the whole circuit works, the output display signal LED is high, thereby controlling the first light emitting diode D1 to emit light and the second light emitting diode D2 to be extinguished; when the whole circuit works, the output display signal LED is low, thereby controlling the second light emitting diode D2 to emit light and the first light emitting diode D1 to be extinguished. Other control logics can also be used, and the control logic of the display sub-circuit is not limited herein.

[0114] In an embodiment, the far-field voice control circuit includes an infrared input sub-circuit. The infrared input sub-circuit is connected with the mainboard control chip. For reference Figure 10 , Figure 10 FIG. 1 is a connection diagram of the infrared input sub-circuit in the far-field voice control circuit of the present application. The infrared input sub-circuit includes:

[0115] The first end of the infrared sensor M0 is connected with the fourth end of the infrared sensor M0 and then grounded;

[0116] The first end of the sixth capacitor C6 is connected with the second end of the infrared sensor M0, and the second end of the sixth capacitor C6 is grounded;

[0117] The first end of the tenth resistor R10 is connected with the first end of the sixth capacitor C6, and the second end of the tenth resistor R10 is connected with the third end of the mainboard control chip 30 and the infrared sensor M0;

[0118] The first end of the eleventh resistor R11 is connected with the first end of the sixth capacitor C6, and the second end of the eleventh resistor R11 is connected with the second power supply VCC2;

[0119] A third transient diode E3, a first end of the third transient diode E3 is connected with the mainboard control chip 30, and a second end of the third transient diode E3 is grounded.

[0120] A seventh capacitor C7, a first end of the seventh capacitor C7 is connected with the second power supply VCC2, and a second end of the seventh capacitor C7 is grounded.

[0121] An eighth capacitor C8, a first end of the eighth capacitor C8 is connected with the second power supply VCC2, and a second end of the eighth capacitor C8 is grounded.

[0122] In the embodiment, the far-field voice control circuit further comprises an infrared input sub-circuit, which is used for accessing external voltage based on an infrared sensor M0 and performing infrared signal input on each unit and chip in the circuit, wherein the first power supply VCC1 and the second power supply VCC2 can be the same power supply but are arranged on different PCB boards. It is worth noting that, referring to Figure 11 , Figure 11 is a connection diagram of the first embodiment of the connector in the far-field voice control circuit of the present application. Since the far-field voice control circuit can be distributed on different PCB boards, the output signal of each unit or circuit can be connected to the connector. At this time, the connector can be connected based on the connection line. Taking the infrared signal IR as an example, the infrared signal IR output by the infrared input sub-circuit is on the a board. The connector a1 of the infrared signal IR can be arranged on the a board. At the same time, the b board needs the infrared signal IR. The connector b1 of the infrared signal IR is arranged on the b board. Then, the infrared signal IR on the connector a1 and the infrared signal IR on the connector b1 can be connected through the connection line, so as to complete the connection between different boards.

[0123] Further, based on the first embodiment, the second embodiment and / or the third embodiment of the present application, the fourth embodiment of the far-field voice control circuit of the present application is proposed. The far-field voice control circuit comprises a connector and a plurality of connection lines. The first end of the mainboard control chip 30 and the output end of the switch chip sub-circuit 10, the first end of the microphone control sub-circuit 40 and the mechanical switch 20, the second end of the microphone control sub-circuit 40 and the control end of the switch chip sub-circuit 10, and the third end of the microphone control sub-circuit 40 and the second end of the mainboard control chip 30 are connected through the connector and the connection line.

[0124] In the embodiment, since the far-field voice control circuit can be distributed on different PCB boards, the output signal of each unit or circuit can be connected to the connector. Referring to Figure 12 , Figure 12The connection diagram of the second embodiment of the connector in the far-field voice control circuit of the application (a group of diodes and transient diodes constitute a TVS tube, such as D3 and E4 constitute a TVS tube), the output end of the mainboard control chip 30 and the switch chip subcircuit 10, the first end of the microphone control subcircuit 40 and the mechanical switch 20, the second end of the microphone control subcircuit 40 and the control end of the switch chip subcircuit 10, and the third end of the microphone control subcircuit 40 and the second end of the mainboard control chip 30 are all connected through connectors and connecting lines (that is, all subcircuits and subcircuits, subcircuits and switches, and subcircuits and chips can be connected using connecting lines and connectors, and the connecting lines refer to Figure 12 the connecting lines between each terminal and other terminals), wherein the signals connected include a microphone data signal SDIO, a microphone return signal BACK, a first power supply VCC1, a display signal LED, and the like, and further the signal transmission between different boards can be realized. Figure 13 , Figure 13 The connection diagram of the third embodiment of the connector in the far-field voice control circuit of the application is based on the second embodiment of the connector in the far-field voice control circuit of the application. Figure 12 The MUTE signal is added to the second embodiment of the connector in the far-field voice control circuit of the application to return the state of the switch chip subcircuit 10 to inform the user whether the far-field voice is turned on, so that the circuit related to the MUTE signal does not need to be newly added to the PCB, and the use cost of the PCB is reduced.

[0125] Based on the first embodiment, the second embodiment, the third embodiment, and / or the fourth embodiment of the far-field voice control circuit, the application further provides a far-field voice control device, which comprises the far-field voice control circuit described above.

[0126] It is worth noting that the far-field voice control device according to the embodiment of the application is connected through the first end of the microphone control subcircuit and the mechanical switch, the second end of the microphone control subcircuit and the control end of the switch chip subcircuit, and the third end of the microphone control subcircuit and the second end of the mainboard control chip, while the first end of the mainboard control chip and the output end of the switch chip subcircuit, and further the mechanical switch can control the switch chip subcircuit to disconnect the connection with the mainboard control chip to disconnect the DATA signal of the microphone in the far-field voice system, thereby avoiding the phenomenon that the human body static interference exists when the mechanical switch is turned off to affect the accuracy of the far-field voice control (that is, affecting the normal work of the far-field voice), and the far-field voice control circuit can disconnect the DATA signal of the microphone in the far-field voice system through the above connection and control mode, and directly use the mechanical switch to turn off, so that the human body static interference exists, and the accuracy of the far-field voice control is ensured through the indirect control of the switch chip subcircuit by the mechanical switch.

[0127] The device provided by the application provides a new control mode of far-field voice to ensure the accuracy of far-field voice control. Compared with the prior art, the device provided by the application has the same beneficial effects as the far-field voice control circuit provided by the above-mentioned embodiments, and details are not repeated here.

[0128] Further, based on the first embodiment of the application, the second embodiment of the far-field voice control device of the application is proposed, referring to Figure 14 , Figure 14 is a connection diagram of the far-field voice control device of the application. The far-field voice control device includes a microphone board 120 and multiple main boards 110. The microphone control sub-circuit 40 is arranged on the microphone board 120. The main board control chip 30 is arranged on one of the main boards 110. The switch chip sub-circuit 10 and the mechanical switch 20 are arranged on another of the main boards 110, or

[0129] The microphone control sub-circuit 40, the switch chip sub-circuit 10, and the mechanical switch 20 are arranged on the microphone board 120. The main board control chip 30 is arranged on the main board 110.

[0130] In this embodiment, referring to Figure 15 , Figure 15 is another connection diagram of the far-field voice control device of the application. The peripherals (internal main boards (i.e., a circuit board) 110) of the far-field voice control device are divided into three modules: a microphone board 120, a receiving / indicating board 140, and a key / voice switch board 130. The power switch and the voice switch are all placed on one board, i.e., the key / voice switch board 130. The signal transmission path is: the microphone board 120 transmits the DATA signal obtained to the main board 110 through a wire, and then the main board 110 transmits the DATA signal to the key / voice switch board 130 through a wire. The mechanical switch 20 on the key / voice switch board 130 controls the switch chip sub-circuit 10 to control the on-off of the DATA, so as to achieve the effect of shutting off the data at the physical layer. Finally, the DATA signal is transmitted to the main board control chip 30, such as a DSP, in the main board 110 through the transmission of multiple modules. The length of the DATA wire increases continuously with the increase of the size of the machine, which makes it difficult for the EMI (Electromagnetic Interference) of the whole machine to meet the requirements, and brings difficulties to the design of the whole machine. At the same time, the transmission of the DATA through a long distance will cause the signal quality to decline, and then affect the far-field voice performance of the whole machine. Therefore, the above arrangement is proposed, referring to Figure 14The small plates include a microphone plate 120 and a receiving / indicating / keying plate 150. The microphone control sub-circuit 40 is arranged on the microphone plate 120, the main plate control chip 30 is arranged on one of the main plates 110, the switch chip sub-circuit 10 and the mechanical switch 20 are arranged on the other main plate 110, or the microphone control sub-circuit 40, the switch chip sub-circuit 10 and the mechanical switch 20 are arranged on the microphone plate 120, and the main plate control chip 30 is arranged on the main plate 110 (other arrangements are also possible, which are not limited herein). The receiving / indicating / keying plate 150 contains the small plates of three basic functions of infrared receiving, power indication and power keying, which can also be applied to devices without far-field voice function. Further, the use of the transmission line material and the small plate of the DATA signal can be reduced, so as to reduce the cost of the far-field voice control device and reduce the EMI problem, and by increasing a MUTE signal, the original MIC plate can still be used to understand the switch state of the switch chip sub-circuit 10 in time.

[0131] The above only describes some embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields based on the technical concept of the present application, and the contents of the specification and drawings are included in the patent protection scope of the present application.

Claims

1. A far-field voice control circuit, characterized by, The far-field voice control circuit comprises: a switch chip subcircuit and a mechanical switch; a mainboard control chip, a first end of the mainboard control chip being connected with an output end of the switch chip subcircuit; a microphone control subcircuit, a first end of the microphone control subcircuit being connected with the mechanical switch, a second end of the microphone control subcircuit being connected with a control end of the switch chip subcircuit, a third end of the microphone control subcircuit being connected with a second end of the mainboard control chip, the microphone control subcircuit being configured to control the switch chip subcircuit to disconnect with the mainboard control chip based on the mechanical switch.

2. The far-field voice control circuit of claim 1, wherein, The switch chip subcircuit comprises: a microphone chip; a switch chip, a third end, a fourth end, a fifth end and a seventh end of the switch chip being grounded, a second end of the switch chip being connected with the microphone chip, a sixth end of the switch chip being connected with a first end of the mainboard control chip; a first resistor, a first end of the first resistor being connected with the second end of the microphone control subcircuit, a second end of the first resistor being connected with a first end of the switch chip; a first capacitor, a first end of the first capacitor being grounded, a second end of the first capacitor being connected with the first end of the switch chip; a second capacitor, a first end of the second capacitor being connected with a first power supply and an eighth end of the switch chip, a second end of the second capacitor being grounded; a third capacitor, a first end of the third capacitor being connected with the first power supply and the eighth end of the switch chip, a second end of the third capacitor being grounded.

3. The far-field voice control circuit of claim 2, wherein, The microphone control subcircuit comprises a switch input unit and a switch output unit, the mechanical switch, the switch input unit, the switch output unit and the second end of the mainboard control chip being connected in sequence, the switch input unit being further connected with the first end of the first resistor, the mechanical switch comprising a first output end and a second output end, the switch input unit comprising: a first transient diode, a first end of the first transient diode being connected with the first output end of the mechanical switch, a second end of the first transient diode being connected with the second output end of the mechanical switch and then grounded; a second resistor, a first end of the second resistor being connected with the first power supply, a second end of the second resistor being connected with the first output end of the mechanical switch and the first end of the first resistor; a third resistor, a first end of the third resistor being connected with the first output end of the mechanical switch, a second end of the third resistor being connected with the switch output unit; a fourth capacitor, a first end of the fourth capacitor being connected with the second end of the third resistor, a second end of the fourth capacitor being grounded.

4. The far-field voice control circuit of claim 3, wherein, When the mechanical switch is a vertical toggle switch, a first end of the vertical toggle switch and a sixth end of the vertical toggle switch are connected and then serve as the second output end, a second end of the vertical toggle switch and a fifth end of the vertical toggle switch are connected and then serve as the first output end. When the mechanical switch is a horizontal toggle switch, the first end of the horizontal toggle switch and the fifth end of the horizontal toggle switch are connected as the second output end after the second end of the horizontal toggle switch is connected as the first output end.

5. The far-field voice control circuit of claim 3, wherein, The switch output unit comprises: a fourth resistor, a first end of the fourth resistor being connected with a second end of the third resistor, and a second end of the fourth resistor being connected with a second end of the mainboard control chip; a fifth resistor, a first end of the fifth resistor being connected with a first end of the fourth resistor; a sixth resistor, a first end of the sixth resistor being connected with the first power supply, and a second end of the sixth resistor being connected with the second end of the mainboard control chip; a switch tube, a third end of the switch tube being connected with a second end of the fifth resistor, a first end of the switch tube being connected with the second end of the mainboard control chip, and a second end of the switch tube being grounded.

6. The far-field voice control circuit of claim 1, wherein, The far-field voice control circuit comprises a key sub-circuit and a display sub-circuit, the key sub-circuit and the display sub-circuit being connected with the mainboard control chip respectively, and the key sub-circuit comprises: a key switch, a first end of the key switch and a second end of the key switch being connected and then grounded; a second transient diode, a first end of the second transient diode being connected with a third end of the key switch and a fourth end of the key switch, and a second end of the second transient diode being grounded; a seventh resistor, a first end of the seventh resistor being connected with the first end of the second transient diode, and a second end of the seventh resistor being connected with a third end of the mainboard control chip; a fifth capacitor, a first end of the fifth capacitor being connected with the second end of the seventh resistor, and a second end of the fifth capacitor being grounded; the display sub-circuit comprises: an eighth resistor, a first end of the eighth resistor being connected with a second power supply, and a second end of the eighth resistor being connected with the mainboard control chip; a ninth resistor, a first end of the ninth resistor being connected with the second power supply; a light emitting device, a first end of the light emitting device being connected with the second end of the eighth resistor, a second end of the light emitting device being grounded, a third end of the light emitting device being connected with a second end of the ninth resistor, and a fourth end of the light emitting device being connected with a fourth end of the mainboard control chip.

7. The far-field voice control circuit of claim 1, wherein, The far-field voice control circuit comprises an infrared input sub-circuit, the infrared input sub-circuit being connected with the mainboard control chip, and the infrared input sub-circuit comprises: an infrared sensor, a first end of the infrared sensor being connected with a fourth end of the infrared sensor and then grounded; a sixth capacitor, a first end of the sixth capacitor being connected with a second end of the infrared sensor, and a second end of the sixth capacitor being grounded; a tenth resistor, a first end of the tenth resistor being connected with the first end of the sixth capacitor, and a second end of the tenth resistor being connected with a third end of the infrared sensor and the mainboard control chip; an eleventh resistor, a first end of the eleventh resistor being connected with the first end of the sixth capacitor, and a second end of the eleventh resistor being connected with the second power supply; A third transient diode, a first end of the third transient diode is connected with the mainboard control chip, and a second end of the third transient diode is grounded; A seventh capacitor, a first end of the seventh capacitor is connected with the second power supply, and a second end of the seventh capacitor is grounded; An eighth capacitor, a first end of the eighth capacitor is connected with the second power supply, and a second end of the eighth capacitor is grounded.

8. The far-field voice control circuit of any one of claims 1 to 7, wherein, The far-field voice control circuit comprises a connector and a plurality of connection lines, and the first end of the mainboard control chip and the output end of the switch chip subcircuit, the first end of the microphone control subcircuit and the mechanical switch, the second end of the microphone control subcircuit and the control end of the switch chip subcircuit, and the third end of the microphone control subcircuit and the second end of the mainboard control chip are connected through the connector and the connection lines.

9. A far-field voice control device, comprising: The far-field voice control device comprises the far-field voice control circuit according to any one of claims 1 to 8.

10. The far-field voice control apparatus of claim 9, wherein, The far-field voice control device comprises a microphone board and a plurality of mainboards, the microphone control subcircuit is arranged on the microphone board, the mainboard control chip is arranged on one of the mainboards, and the switch chip subcircuit and the mechanical switch are arranged on another one of the mainboards, or The microphone control subcircuit, the switch chip subcircuit and the mechanical switch are arranged on the microphone board, and the mainboard control chip is arranged on the mainboard.

Images