Switching circuit for main and standby equipment of power amplifier

Abstract

The utility model relates to the technical field of power amplifier equipment switching, and discloses a power amplifier main and standby equipment switching circuit which comprises a first change-over switch module and a second change-over switch module. According to the application, the first change-over switch module and the second change-over switch module receive the same control signal to realize the switching between the main and standby devices, and the types of electronic components are single, so that the problems of production efficiency, finished product management and comprehensive cost caused by the optimization of the power amplifier main and standby device switching circuit structure are finally solved.

Description

Technical Field

[0001] The present application relates to the technical field of power amplifier device switching, and in particular to a power amplifier master-slave device switching circuit. Background Art

[0002] Amplifier master / backup switching circuits are commonly used to ensure the stability of audio systems during operation. When the primary amplifier fails, automatic or manual switching to the backup amplifier is performed to prevent audio signal interruption. However, existing amplifier master / backup switching circuit structures suffer from low production efficiency, complex product management, and high overall costs. Therefore, research on optimizing this circuit is necessary. Utility Model Content

[0003] The purpose of this application is to provide a power amplifier master-slave device switching circuit to solve the technical problems raised in the above background technology.

[0004] To achieve the above-mentioned object, the present application discloses the following technical solutions: a power amplifier master-slave device switching circuit, comprising a first switching switch module and a second switching switch module;

[0005] The first switching module includes a resistor R172, a resistor R176, a transistor Q13, a single-pole double-throw relay K14 and a diode D21;

[0006] The second switch module includes a resistor R209, a resistor R210, a transistor Q19, a single-pole double-throw relay K15, a diode D31 and a connector CON15.

[0007] Preferably, the connection mode of the first switching module is as follows:

[0008] Pin 1 of the resistor R172 and pin 1 of the resistor R176 are both connected to the output end of the external control part, pin 2 of the resistor R172 is connected to the base of the transistor Q13, pin 2 of the resistor R176 is grounded, the emitter of the transistor Q13 is grounded, one end of the coil pin of the single-pole double-throw relay K14 and the positive electrode of the diode D21 are both connected to the collector of the transistor Q13, the other end of the coil pin of the single-pole double-throw relay K14 and the negative electrode of the diode D21 are both connected to an external +24V power supply, the common pin of the single-pole double-throw relay K14 is connected to the normally closed pin of the single-pole double-throw relay K14 when the coil is not energized, and the common pin of the single-pole double-throw relay K14 is connected to the normally open pin of the single-pole double-throw relay K14 when the coil is energized;

[0009] The common pin of the single-pole double-throw relay K14 is also connected to the positive pole of the external load, the normally closed pin of the single-pole double-throw relay K14 is also connected to the positive pole of the output end of the external main device, the normally open pin of the single-pole double-throw relay K14 is also connected to pin 1 of the connector CON15, and pin 2 of the connector CON15 is connected to the normally open pin of the single-pole double-throw relay K15.

[0010] Preferably, the connection mode of the second switch module is as follows:

[0011] Pin 1 of the resistor R209 and pin 1 of the resistor R210 are both connected to the output end of the external control part, pin 2 of the resistor R209 is connected to the base of the transistor Q19, pin 2 of the resistor R210 is grounded, the emitter of the transistor Q19 is grounded, one end of the coil pin of the single-pole double-throw relay K15 and the positive electrode of the diode D31 are both connected to the collector of the transistor Q19, the other end of the coil pin of the single-pole double-throw relay K15 and the negative electrode of the diode D31 are both connected to an external +24V power supply, the common pin of the single-pole double-throw relay K15 is connected to the normally closed pin of the single-pole double-throw relay K15 when the coil is not energized, and the common pin of the single-pole double-throw relay K15 is connected to the normally open pin of the single-pole double-throw relay K15 when the coil is energized;

[0012] The common pin of the single-pole double-throw relay K15 is also connected to the negative pole of the external load, and the normally closed pin of the single-pole double-throw relay K15 is also connected to the negative pole of the output end of the external main device.

[0013] Preferably, pin 1 of the connector CON15 is connected to the positive pole of the external backup device, and pin 2 of the connector CON15 is connected to the negative pole of the external backup device. When the external backup device is working, the normally open pin of the single-pole double-throw relay K14 is connected to pin 1 of the connector CON15, and the normally open pin of the single-pole double-throw relay K15 is connected to pin 2 of the connector CON15.

[0014] Beneficial effect: A power amplifier master-slave device switching circuit of the present application realizes switching between master and slave devices by receiving the same control signal through the first switching switch module and the second switching switch module, and the type of electronic components is single, which optimizes the production efficiency, finished product management and comprehensive cost problems caused by the power amplifier master-slave device switching circuit structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a circuit schematic diagram of the power amplifier master-slave device switching circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0017] The following is a clear and complete description of the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0018] In this document, the term "comprising" is intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0019] This embodiment discloses Figure 1 A power amplifier master / slave device switching circuit shown includes a first switching switch module and a second switching switch module;

[0020] The first switch module includes a resistor R172, a resistor R176, a transistor Q13, a single-pole double-throw relay K14 and a diode D21;

[0021] In this embodiment, the resistance of resistor R172 is 5.1K, the resistance of resistor R176 is 10K, the model of transistor Q13 is MMBT3904, and the model of diode D21 is 1N4007. The signal transmission to the external host device is realized through the first switching module.

[0022] The second switch module includes a resistor R209, a resistor R210, a transistor Q19, a single-pole double-throw relay K15, a diode D31 and a connector CON15.

[0023] In this embodiment, the resistance of resistor R209 is 5.1K, the resistance of resistor R210 is 10K, the model of transistor Q19 is MMBT3904, and the model of diode D31 is 1N4007. The signal transmission to the external backup device is realized through the second switching module.

[0024] Specifically, the connection method of the first switching switch module is:

[0025] Pin 1 of resistor R172 and pin 1 of resistor R176 are both connected to the output end of the external control part, pin 2 of resistor R172 is connected to the base of transistor Q13, pin 2 of resistor R176 is grounded, the emitter of transistor Q13 is grounded, one end of the coil pin of single-pole double-throw relay K14 and the anode of diode D21 are both connected to the collector of transistor Q13, the other end of the coil pin of single-pole double-throw relay K14 and the cathode of diode D21 are both connected to an external +24V power supply, the common pin of single-pole double-throw relay K14 is connected to the normally closed pin of single-pole double-throw relay K14 when the coil is not energized, and the common pin of single-pole double-throw relay K14 is connected to the normally open pin of single-pole double-throw relay K14 when the coil is energized;

[0026] The common pin of the single-pole double-throw relay K14 is also connected to the positive pole of the external load, the normally closed pin of the single-pole double-throw relay K14 is also connected to the positive pole of the output end of the external main device, the normally open pin of the single-pole double-throw relay K14 is also connected to pin 1 of the connector CON15, and pin 2 of the connector CON15 is connected to the normally open pin of the single-pole double-throw relay K15.

[0027] It should be noted that, in this embodiment, all are externally connected to the output ends of the same external control part and are controlled by the same external control part.

[0028] In this embodiment, if Figure 1 As shown, pin 1 of the single-pole double-throw relay K14 is the common pin, pin 2 is the normally closed pin, pin 3 is the normally open pin, pin 4 is the other end of the coil pin, and pin 5 is one end of the coil pin.

[0029] Specifically, the connection method of the second switch module is as follows:

[0030] Pin 1 of resistor R209 and pin 1 of resistor R210 are both connected to the output end of the external control part, pin 2 of resistor R209 is connected to the base of transistor Q19, pin 2 of resistor R210 is grounded, the emitter of transistor Q19 is grounded, one end of the coil pin of single-pole double-throw relay K15 and the anode of diode D31 are both connected to the collector of transistor Q19, the other end of the coil pin of single-pole double-throw relay K15 and the cathode of diode D31 are both connected to the external +24V power supply, the common pin of single-pole double-throw relay K15 is connected to the normally closed pin of single-pole double-throw relay K15 when the coil is not energized, and the common pin of single-pole double-throw relay K15 is connected to the normally open pin of single-pole double-throw relay K15 when the coil is energized;

[0031] The common pin of the single-pole double-throw relay K15 is also connected to the negative pole of the external load, and the normally closed pin of the single-pole double-throw relay K15 is also connected to the negative pole of the output terminal of the external main device.

[0032] In this embodiment, if Figure 1 As shown, pin 1 of the single-pole double-throw relay K15 is the common pin, pin 2 is the normally closed pin, pin 3 is the normally open pin, pin 4 is the other end of the coil pin, and pin 5 is one end of the coil pin.

[0033] Specifically, pin 1 of connector CON15 is connected to the positive pole of the external backup device, and pin 2 of connector CON15 is connected to the negative pole of the external backup device. When the external backup device is working, the normally open pin of the single-pole double-throw relay K14 is connected to pin 1 of connector CON15, and the normally open pin of the single-pole double-throw relay K15 is connected to pin 2 of connector CON15.

[0034] The working principle of this embodiment is as follows:

[0035] When the resistors R172 and R176 of the first switching switch module receive the control signal AMP_RELAY1 at the output end of the external control part, the first switching switch module works. At this time, pins 1 and 2 of K14 are connected, and pins 1 and 2 of K15 are connected. The FROMAMP1_OUT+ of the external master device is connected to the SW_HOT1 of the external load via pins 2 and 1 of K14, and the FROM AMP1_OUT- of the external master device is connected to the SW_COM1 of the external load via pins 2 and 1 of K15.

[0036] When switching, the resistors R209 and R210 of the second switching switch module receive the control signal AMP_RELAY1 at the output end of the external control part, and switch to the second switching switch module. At this time, the pins 1 and 3 of K14 are connected, and the pins 1 and 3 of K15 are connected. The BACKUP+ of the external backup device is connected to the SW_HOT1 of the external load via the pins 3 and 1 of K14, and the BACKUP- of the external backup device is connected to the SW_COM1 of the external load via the pins 3 and 1 of K15.

[0037] In summary, the power amplifier master-slave device switching circuit of this embodiment realizes switching between the master and standby devices by receiving the same control signal through the first switching switch module and the second switching switch module, and the type of electronic components is single, which optimizes the production efficiency, finished product management and comprehensive cost problems caused by the power amplifier master-slave device switching circuit structure.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A power amplifier master / slave device switching circuit, characterized in that: comprising a first switching module and a second switching module; The first switching module includes a resistor R172, a resistor R176, a transistor Q13, a single-pole double-throw relay K14 and a diode D21; The second switch module includes a resistor R209, a resistor R210, a transistor Q19, a single-pole double-throw relay K15, a diode D31 and a connector CON15; The connection mode of the first switching module is specifically as follows: Pin 1 of the resistor R172 and pin 1 of the resistor R176 are both connected to the output end of the external control part, pin 2 of the resistor R172 is connected to the base of the transistor Q13, pin 2 of the resistor R176 is grounded, the emitter of the transistor Q13 is grounded, one end of the coil pin of the single-pole double-throw relay K14 and the positive electrode of the diode D21 are both connected to the collector of the transistor Q13, the other end of the coil pin of the single-pole double-throw relay K14 and the negative electrode of the diode D21 are both connected to an external +24V power supply, the common pin of the single-pole double-throw relay K14 is connected to the normally closed pin of the single-pole double-throw relay K14 when the coil is not energized, and the common pin of the single-pole double-throw relay K14 is connected to the normally open pin of the single-pole double-throw relay K14 when the coil is energized; The common pin of the single-pole double-throw relay K14 is also connected to the positive electrode of the external load, the normally closed pin of the single-pole double-throw relay K14 is also connected to the positive electrode of the output end of the external master device, the normally open pin of the single-pole double-throw relay K14 is also connected to pin 1 of the connector CON15, and pin 2 of the connector CON15 is connected to the normally open pin of the single-pole double-throw relay K15; The connection method of the second switch module is specifically as follows: Pin 1 of the resistor R209 and pin 1 of the resistor R210 are both connected to the output end of the external control part, pin 2 of the resistor R209 is connected to the base of the transistor Q19, pin 2 of the resistor R210 is grounded, the emitter of the transistor Q19 is grounded, one end of the coil pin of the single-pole double-throw relay K15 and the positive electrode of the diode D31 are both connected to the collector of the transistor Q19, the other end of the coil pin of the single-pole double-throw relay K15 and the negative electrode of the diode D31 are both connected to an external +24V power supply, the common pin of the single-pole double-throw relay K15 is connected to the normally closed pin of the single-pole double-throw relay K15 when the coil is not energized, and the common pin of the single-pole double-throw relay K15 is connected to the normally open pin of the single-pole double-throw relay K15 when the coil is energized; The common pin of the single-pole double-throw relay K15 is also connected to the negative pole of the external load, and the normally closed pin of the single-pole double-throw relay K15 is also connected to the negative pole of the output end of the external main device; Pin 1 of the connector CON15 is connected to the positive pole of the external backup device, and pin 2 of the connector CON15 is connected to the negative pole of the external backup device. When the external backup device is working, the normally open pin of the single-pole double-throw relay K14 is connected to pin 1 of the connector CON15, and the normally open pin of the single-pole double-throw relay K15 is connected to pin 2 of the connector CON15.

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