A single-channel multi-mode switching circuit

Abstract

The invention discloses a single-channel multi-mode switching circuit, comprising a power supply, a first triode, a second triode, a third triode, a fourth triode, a fifth triode, a sixth triode and a seventh triode; multi-mode switching of the circuit is realized through seven triodes and a load circuit.

Description

Technical Field

[0001] The present invention relates to the field of circuits, and in particular to a single-channel multi-mode switching circuit. Background Art

[0002] Currently, the designs of multi-mode switching circuits on the market are all based on single-chip microcomputers. Most of the chips used by manufacturers in the circuits are imported from foreign countries, and most of the circuits can only realize one mode, which is costly and inconvenient. Summary of the invention

[0003] In view of the above problems, the present invention provides a single-channel multi-mode switching circuit, which can realize the single-channel multi-mode function without using any chip in the circuit. The entire circuit uses transistors and resistors, capacitors, and inductors for adjustment. The production cost is extremely low and multi-mode switching of the circuit can be realized.

[0004] The technical solution of the present invention is:

[0005] A single-channel multi-mode switching circuit comprises a power supply, a first triode, a second triode, a third triode, a fourth triode, a fifth triode, a sixth triode and a seventh triode; further comprising a first load circuit, a second load circuit, a third load circuit, a fourth load circuit, a fifth load circuit, a sixth load circuit, a seventh load circuit, an eighth load circuit, a ninth load circuit, a tenth load circuit, a first load filter circuit, a second load filter circuit, a first filter circuit and a second filter circuit; a first pin of the first triode is connected to the first load circuit, a second pin of the first triode is connected to the power supply, and a third pin of the first triode is connected to the first load filter circuit; a first pin of the second triode is connected to the second load circuit, a second pin of the second triode is connected to the third load circuit, a third pin of the second triode is connected to the fourth load circuit, and a third triode is connected to the fourth load circuit. The first pin of the transistor is connected to the first filtering circuit, the second pin of the third transistor is connected to the power supply, the third pin of the third transistor is connected to the fifth load circuit, the first pin of the fourth transistor is connected to the second filtering circuit, the second pin of the fourth transistor is connected to the power supply, the third pin of the fourth transistor is connected to the sixth load circuit, the first pin of the fifth transistor is connected to the seventh load circuit, the second pin of the fifth transistor is grounded, the third pin of the fifth transistor is connected to the eighth load circuit, the first pin of the sixth transistor is connected to the ninth load circuit, the second pin of the sixth transistor is grounded, the third pin of the sixth transistor is connected to the tenth load circuit, the first pin of the seventh transistor is connected to the second load filtering circuit, the second pin of the seventh transistor is grounded, and the third pin of the seventh transistor is connected to the third load filtering circuit.

[0006] The working principle of the above technical solution is as follows:

[0007] The circuit in this technical solution uses seven transistors. By adjusting the ratio of the circuits connected to the seven transistors, the switching of multi-mode circuits can be realized. By detecting the characteristic curve of this circuit, data analysis is performed on this circuit. Because this circuit does not use any chips, it is all composed of components such as transistors. The input value of each port is controlled, so that this circuit is equivalent to different circuits. It is equivalent to a circuit in current input mode, a circuit in resistance input mode, a circuit in PCT resistance mode, a sensor circuit of PT1000, an operational amplifier circuit, a circuit for NTC collection, and a circuit for PT resistance collection.

[0008] In a further technical solution, the circuit includes a first inductor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor and a fifth capacitor; the first load circuit includes the third resistor and the eleventh resistor, the first load filter circuit includes the first resistor and the second capacitor, the second load circuit includes the third resistor, the third load circuit includes the eleventh resistor, the fourth load circuit includes the second resistor, the first filter circuit includes the first capacitor, the fifth load circuit includes the fifth resistor and the sixth resistor, and the second filter circuit includes the first capacitor. The first load circuit includes the third capacitor, the sixth load circuit includes the sixth resistor, the seventh load circuit includes the twelfth resistor, the eighth load circuit includes the tenth resistor, the ninth load circuit is connected in parallel with the third resistor and the eleventh resistor, the tenth load circuit includes the twelfth resistor, the second load filter circuit includes a ninth resistor, an eleventh resistor and a fourth capacitor, the ninth resistor and the eleventh resistor are connected in parallel, the ninth resistor is connected to the fourth capacitor, the third load filter circuit includes a fourth resistor, a seventh resistor, a fifth capacitor and a first inductor, the fourth resistor is connected to the seventh resistor and the first inductor, the fourth resistor is connected to the fifth capacitor, and the fifth capacitor is connected in parallel with the fourth resistor, the seventh resistor and the first inductor.

[0009] The beneficial effects of the present invention are:

[0010] 1. This circuit can realize all functions of the entire circuit without using chips, thus reducing the production cost of the circuit;

[0011] 2. By replacing analog switches and switches with transistors in the circuit, the production cost of the circuit is reduced, and single-channel multi-mode circuit switching can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a layout diagram of a single-channel multi-mode switching circuit according to an embodiment of the present invention;

[0013] Figure 2 is an equivalent circuit of the current input mode described in the embodiment of the present invention;

[0014] Figure 3 is an equivalent circuit of the resistance input mode described in the embodiment of the present invention;

[0015] Figure 4 is an equivalent circuit of the PCT resistor described in the embodiment of the present invention;

[0016] Figure 5 It is an equivalent sensor circuit of PT1000 described in the embodiment of the present invention;

[0017] Figure 6 is the operational amplifier equivalent circuit described in the embodiment of the present invention;

[0018] Figure 7 is the equivalent circuit of the NTC acquisition described in the embodiment of the present invention;

[0019] Figure 8 This is the equivalent circuit for collecting the PT resistance value described in the embodiment of the present invention. DETAILED DESCRIPTION

[0020] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0021] Example:

[0022] like Figure 1 As shown, a single-channel multi-mode switching circuit includes a power supply, a first triode, a second triode, a third triode, a fourth triode, a fifth triode, a sixth triode and a seventh triode; and also includes a first load circuit, a second load circuit, a third load circuit, a fourth load circuit, a fifth load circuit, a sixth load circuit, a seventh load circuit, an eighth load circuit, a ninth load circuit, a tenth load circuit, a first load filter circuit, a second load filter circuit, a first filter circuit and a second filter circuit; a first pin of the first triode is connected to the first load circuit, a second pin of the first triode is connected to the power supply, and a third pin of the first triode is connected to the first load filter circuit; a first pin of the second triode is connected to the second load circuit, a second pin of the second triode is connected to the third load circuit, and a third pin of the second triode is connected to the The first pin of the third transistor is connected to the fourth load circuit, the first pin of the third transistor is connected to the first filter circuit, the second pin of the third transistor is connected to the power supply, the third pin of the third transistor is connected to the fifth load circuit, the first pin of the fourth transistor is connected to the second filter circuit, the second pin of the fourth transistor is connected to the power supply, the third pin of the fourth transistor is connected to the sixth load circuit, the first pin of the fifth transistor is connected to the seventh load circuit, the second pin of the fifth transistor is grounded, the third pin of the fifth transistor is connected to the eighth load circuit, the first pin of the sixth transistor is connected to the ninth load circuit, the second pin of the sixth transistor is grounded, the third pin of the sixth transistor is connected to the tenth load circuit, the first pin of the seventh transistor is connected to the second load filter circuit, the second pin of the seventh transistor is grounded, and the third pin of the seventh transistor is connected to the third load filter circuit.

[0023] The working principle of the above technical solution is as follows:

[0024] The circuit in this technical solution uses seven transistors. By adjusting the ratio of the circuits connected to the seven transistors, the switching of multi-mode circuits can be realized. By detecting the characteristic curve of this circuit, data analysis is performed on this circuit. Because this circuit does not use any chips, it is all composed of components such as transistors. The input value of each port is controlled, so that this circuit is equivalent to different circuits. It is equivalent to a circuit in current input mode, a circuit in resistance input mode, a circuit in PCT resistance mode, a sensor circuit of PT1000, an operational amplifier circuit, a circuit for NTC collection, and a circuit for PT resistance collection.

[0025] In this embodiment, the first transistor BC847B, the second transistor BAT54A, the third transistor DTA114EKA, the fourth transistor DTA114EKA, the fifth transistor BC847B, the sixth transistor BC847B and the seventh transistor BC847B; the second pin of the first transistor BC847B is grounded, the third pin of the first transistor BC847B is connected to the first resistor; the first pin of the second transistor BAT54A is connected to the third resistor, and the second transistor BAT54A is connected to the third resistor. The second pin of the second transistor BAT54A is connected to the eleventh resistor, the third pin of the second transistor BAT54A is connected to the power supply through the second resistor, and the third pin of the second transistor BAT54A is connected to the first transistor BC847B; the first pin of the third transistor DTA114EKA is grounded through the first capacitor, the second pin of the third transistor DTA114EKA is connected to the power supply, and the third pin of the third transistor DTA114EKA is connected to the fifth resistor and the sixth resistor; the fourth transistor DTA114EKA The first pin of the fourth transistor DTA114EKA is grounded through the third capacitor, the second pin of the fourth transistor DTA114EKA is connected to the power supply, and the third pin of the fourth transistor DTA114EKA is connected to the eighth resistor; the first pin of the fifth transistor BC847B is grounded through the twelfth resistor, the first pin of the fifth transistor BC847B is connected to the sixth transistor BC847B, the second pin of the fifth transistor BC847B is grounded, and the third pin of the fifth transistor BC847B is connected to the tenth resistor; the first pin of the sixth transistor BC847B is respectively connected to the third resistor and the eleventh resistor, the second pin of the sixth transistor BC847B is grounded, and the third pin of the sixth transistor BC847B is connected to the power supply through the eleventh resistor; the first pin of the seventh transistor BC847B is grounded through the ninth resistor and the fourth capacitor, the first pin of the seventh transistor BC847B is grounded through the eleventh resistor, the second pin of the seventh transistor BC847B is grounded, and the third pin of the seventh transistor BC847B is connected to the fourth resistor.

[0026] In another embodiment, the circuit includes a first inductor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor and a fifth capacitor; the first load circuit includes the third resistor and the eleventh resistor, the first load filter circuit includes the first resistor and the second capacitor, the second load circuit includes the third resistor, the third load circuit includes the eleventh resistor, the fourth load circuit includes the second resistor, the first filter circuit includes the first capacitor, and the fifth load circuit includes the fifth resistor and the sixth capacitor. The second filter circuit includes a third capacitor, the sixth load circuit includes a sixth resistor, the seventh load circuit includes a twelfth resistor, the eighth load circuit includes a tenth resistor, the ninth load circuit is connected in parallel with the third resistor and the eleventh resistor, the tenth load circuit includes the twelfth resistor, the second load filter circuit includes a ninth resistor, an eleventh resistor and a fourth capacitor, the ninth resistor and the eleventh resistor are connected in parallel, the ninth resistor is connected to the fourth capacitor, the third load filter circuit includes a fourth resistor, a seventh resistor, a fifth capacitor and a first inductor, the fourth resistor is connected to the seventh resistor and the first inductor, the fourth resistor is connected to the fifth capacitor, and the fifth capacitor is connected to the fourth resistor, the seventh resistor and the first inductor in parallel.

[0027] In this embodiment, the first inductor is connected to the seventh transistor BC847B through the fourth resistor and the seventh resistor.

[0028] In another embodiment, if Figure 2 As shown, in this embodiment, the input value of the Int1 input terminal is 0, the input value of the Int2 input terminal is 0, and the input value of the Int3 input terminal is 0. The circuit is equivalent to Figure 2 The circuit shown.

[0029] Figure 2 The equivalent circuit of the current input mode can sample the current from the Out interface to complete the conversion of the current input mode.

[0030] When the voltage value of the Out terminal is in the range of 0V-3V, current sampling is performed.

[0031] The calculation formula of the voltage at the Out terminal in this embodiment is as follows:

[0032]

[0033] In another embodiment, if Figure 3 As shown, in this embodiment, the input value of the Int1 input terminal is 0, the input value of the Int2 input terminal is 1, and the input value of the Int3 input terminal is 0. The circuit is equivalent to Figure 3 The circuit shown is also equivalent to a digital input mode circuit.

[0034] Figure 3 The equivalent circuit of the resistance input mode in the figure can sample the resistance from the Out interface to complete the conversion of the resistance input mode.

[0035] When the voltage value of the Out terminal is 3V, it is open circuit, and when the voltage value of the Out terminal is 0V, it is closed.

[0036] The calculation formula of the voltage at the Out terminal in this embodiment is as follows:

[0037]

[0038] In another embodiment, if Figure 4 As shown, in this embodiment, the input value of the Int1 input terminal is 1, the input value of the Int2 input terminal is 1, and the input value of the Int3 input terminal is 0. The circuit is equivalent to Figure 4 The circuit shown.

[0039] Figure 4 The equivalent circuit of the PTC resistor in the figure can sample the current from the Out interface to complete the conversion of the PTC resistor mode.

[0040] The calculation formula of the voltage at the Out terminal in this embodiment is as follows:

[0041]

[0042] In another embodiment, if Figure 5 As shown, in this embodiment, the input value of the Int1 input terminal is 1, the input value of the Int2 input terminal is 0, and the input value of the Int3 input terminal is 0. The circuit is equivalent to Figure 5 The circuit shown is also equivalent to a resistor PT1000 mode circuit.

[0043] Figure 5 The equivalent circuit of the sensor in the figure can be sampled from the Out interface to complete the conversion of the sensor mode.

[0044] The calculation formula of the voltage at the Out terminal in this embodiment is as follows:

[0045]

[0046] In another embodiment, if Figure 6 As shown, in this embodiment, the input value of the Int1 input terminal is 0, the input value of the Int2 input terminal is 0, and the input value of the Int3 input terminal is 1. The circuit is equivalent to Figure 6 The circuit shown.

[0047] Figure 6The equivalent circuit of the op amp mode can be sampled from the Out interface to complete the conversion of the 1 / 3 op amp mode.

[0048] Sampling is performed when the Out range is 0V-3V.

[0049] The calculation formula of the voltage at the Out terminal in this embodiment is as follows:

[0050]

[0051] In another embodiment, if Figure 7 As shown, in this embodiment, the input value of the Int1 input terminal is 0, the input value of the Int2 input terminal is 1, and the input value of the Int3 input terminal is 1. The circuit is equivalent to Figure 7 The circuit shown.

[0052] Figure 7 The equivalent circuit of NTC resistance acquisition in the example can sample NTC resistance from the Out interface and complete the conversion of NTC resistance mode.

[0053] The calculation formula of the voltage at the Out terminal in this embodiment is as follows:

[0054]

[0055] In another embodiment, if Figure 8 As shown, in this embodiment, the input value of the Int1 input terminal is 1, the input value of the Int2 input terminal is 0, and the input value of the Int3 input terminal is 1. The circuit is equivalent to Figure 8 The circuit shown.

[0056] Figure 8 The equivalent circuit of the PT resistance mode in the figure can sample the PT resistance from the Out interface to complete the conversion of the PT resistance mode.

[0057] The calculation formula of the voltage at the Out terminal in this embodiment is as follows:

[0058]

[0059] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A single-channel multi-mode switching circuit, characterized in that: The invention comprises a power supply, a first triode, a second triode, a third triode, a fourth triode, a fifth triode, a sixth triode and a seventh triode; and further comprises a first load circuit, a second load circuit, a third load circuit, a fourth load circuit, a fifth load circuit, a sixth load circuit, a seventh load circuit, an eighth load circuit, a ninth load circuit, a tenth load circuit, a first load filter circuit, a second load filter circuit, a first filter circuit and a second filter circuit; a first pin of the first triode is connected to the first load circuit, a second pin of the first triode is connected to the power supply, and a third pin of the first triode is connected to the first load filter circuit; a first pin of the second triode is connected to the second load circuit, a second pin of the second triode is connected to the third load circuit, a third pin of the second triode is connected to the fourth load circuit, and a first pin of the third triode is connected to the The first filter circuit is connected, the second pin of the third transistor is connected to the power supply, the third pin of the third transistor is connected to the fifth load circuit, the first pin of the fourth transistor is connected to the second filter circuit, the second pin of the fourth transistor is connected to the power supply, the third pin of the fourth transistor is connected to the sixth load circuit, the first pin of the fifth transistor is connected to the seventh load circuit, the second pin of the fifth transistor is grounded, the third pin of the fifth transistor is connected to the eighth load circuit, the first pin of the sixth transistor is connected to the ninth load circuit, the second pin of the sixth transistor is grounded, the third pin of the sixth transistor is connected to the tenth load circuit, the first pin of the seventh transistor is connected to the second load filter circuit, the second pin of the seventh transistor is grounded, and the third pin of the seventh transistor is connected to the third load filter circuit; The first load circuit includes a third resistor and an eleventh resistor, the first load filter circuit includes a first resistor and a second capacitor, the second load circuit includes a third resistor, the third load circuit includes an eleventh resistor, the fourth load circuit includes a second resistor, the first filter circuit includes a first capacitor, the fifth load circuit includes a fifth resistor and a sixth resistor, the second filter circuit includes a third capacitor, the sixth load circuit includes a sixth resistor, the seventh load circuit includes a twelfth resistor, the eighth load circuit includes a tenth resistor, the ninth load circuit is connected in parallel with the third resistor and the eleventh resistor, the tenth load circuit includes the twelfth resistor, the second load filter circuit includes a ninth resistor, an eleventh resistor and a fourth capacitor, the ninth resistor and the eleventh resistor are connected in parallel, and the ninth resistor is connected to the fourth capacitor, the third load filter circuit includes a fourth resistor, a seventh resistor, a fifth capacitor and a first inductor, the fourth resistor is connected to the seventh resistor and the first inductor, the fourth resistor is connected to the fifth capacitor, and the fifth capacitor is connected to the fourth resistor, the seventh resistor and the first inductor in parallel.

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