CN213368069U

CN213368069U - Control circuit for cascade output wireless microphone receiver

Info

Publication number: CN213368069U
Application number: CN202022855415.0U
Authority: CN
Inventors: 杨志豪; 黄聪华
Original assignee: Guangdong Desheng Electronics Co ltd
Current assignee: Guangdong Desheng Electronics Co ltd
Priority date: 2020-12-01
Filing date: 2020-12-01
Publication date: 2021-06-04
Anticipated expiration: 2030-12-01

Abstract

The utility model relates to a control circuit for cascade output wireless microphone receiver, which comprises a control module, a power module, an antenna receiving module, a control module, an audio processing module and a cascade transmission module, wherein the power module, the antenna receiving module, the control module, the audio processing module and the cascade transmission module are all electrically connected with the control module; the cascade transmission module comprises a cascade input circuit and a cascade output circuit, the cascade input circuit is connected with the cascade output circuit, the cascade input circuit is used for filtering and eliminating redundant signal processing of audio signals, and then the cascade output circuit is used for audio mixing and audio differential processing, so that cascade audio signal transmission is realized.

Description

Control circuit for cascade output wireless microphone receiver

Technical Field

The utility model relates to a receiver circuit field, more specifically relates to a control circuit for cascading output wireless microphone receiver.

Background

As the demand for microphones increases, and to some extent, the demand for microphone receivers increases, the role of microphone receivers is manifested in the field where a large number of microphones are required.

When the large-scale scene faces, often need many wireless microphone receivers to use jointly, need to insert equipment such as sound console when many equipment output and just can unify the mixed output, need have certain channel quantity requirement and pressure to equipment such as sound console, many microphone receivers are exported alone to the sound console and need lay a large amount of wires and cause the waste, have increased the degree of difficulty scheduling problem of construction.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome many receivers and connect output device simultaneously among the prior art and cause inconvenient problem, the utility model aims to solve the technical problem that a control circuit for cascading output wireless microphone receiver is provided.

A control circuit for a cascade output wireless microphone receiver comprises a control module, a power supply module, an antenna receiving module, a control module, an audio processing module and a cascade transmission module, wherein the power supply module, the antenna receiving module, the control module, the audio processing module and the cascade transmission module are all electrically connected with the control module; the cascade transmission module comprises a cascade input circuit and a cascade output circuit, the cascade input circuit is connected with the cascade output circuit, a plurality of microphone signals are mixed through the cascade input circuit, and then the signals are amplified and differentially processed and output through the interior of the cascade output circuit.

Further, the cascade input circuit comprises an input interface J8, a capacitor C360, a capacitor C361, a resistor R245, a resistor R261 and an operational amplifier U22-A, wherein the positive pole input end of the input interface J8 is sequentially connected with one ends of the capacitor C361 and the resistor R245, the other end of the resistor R245 is connected with the positive pole end of the operational amplifier U22-A, the negative pole input end of the input interface J8 is sequentially connected with one ends of the capacitor C360 and the resistor R261, the other end of the resistor R261 is connected with the negative pole end of the operational amplifier U22-A, the grounding end of the input interface J8 is grounded, and one of the audio frequencies is obtained through the circuit due to the input signal dual-tone frequency.

Further, the cascade input circuit further comprises a capacitor C110, a resistor R250, a resistor R246, a capacitor C101 and a resistor R248, the capacitor C110 is connected with the resistor R250 in parallel, two ends of the capacitor C110 are respectively connected with the negative end of the operational amplifier U22-A and the output end of the operational amplifier U22-A, the output end of the operational amplifier U22-A is sequentially connected with one ends of the resistor R246, the capacitor C101 and the resistor R248, the other end of the resistor R248 is grounded, a node between the capacitor C101 and the resistor R248 is connected with the cascade output circuit, and output signals are further filtered through the capacitor C110 and the resistor R250.

Further, the cascade input circuit further comprises an anti-interference circuit, the anti-interference circuit comprises a resistor R238, a capacitor C60, a resistor R87 and a capacitor C21, the resistor R87 is connected with the capacitor C21 in parallel, one ends of the resistor 87 and the capacitor C21 are both grounded, and the other ends of the resistor R87 and the capacitor C21 are both connected with the negative input end of the input interface J8; the resistor R238 and the capacitor C60 are connected in parallel, one end of the resistor R238 and one end of the capacitor C60 are both connected with the positive input end and the grounding end of the input interface J8, the other ends of the resistor R238 and the capacitor C60 are both grounded, and by means of an anti-interference circuit, signals input in the early stage can be filtered, and audio loss caused by interference is reduced.

Furthermore, the cascade input circuit further comprises a capacitor C99, a resistor R249, an operational amplifier U22-B, a resistor R251 and a resistor R260, one end of the resistor R249 is connected with a node between the resistor R245 and the operational amplifier U22-B, the other end of the resistor R249 is sequentially connected with one ends of the operational amplifier U22-B, the resistor R251 and the resistor R260, the other end of the resistor R260 is connected with a power supply, the capacitor C99 is connected with the resistor R249 in parallel, the circuit is another audio signal transmission circuit and has the function of avoiding interference caused by two same signals, and therefore the circuit is added to eliminate one audio signal.

Further, the cascade output circuit comprises an operational amplifier U20, a resistor R105, a capacitor C252, a resistor R105, a resistor R107, an operational amplifier U21, a resistor R106, a capacitor C253, a capacitor C254, a resistor 114 and an output interface J27, the cascade input circuit is connected with the negative terminal of the operational amplifier U20, the two terminals of the resistor R105 are respectively connected with the negative terminal of the operational amplifier U20 and the output terminal of the operational amplifier U20, the capacitor C252 is connected in parallel with the resistor R105, the two terminals of the resistor R107 are respectively connected with the output terminal of the operational amplifier U20 and the negative terminal of the operational amplifier U21, the two terminals of the resistor R106 are respectively connected with the negative terminal of the operational amplifier U21 and the output terminal of the operational amplifier U21, the capacitor C253 is connected in parallel with the resistor R106, the positive terminal of the operational amplifier U20 is connected with the positive terminal of the operational amplifier U21, the output terminal of the operational amplifier U21 is sequentially connected with the capacitor C254, the resistor 114 and, then, the signals are differentiated by an operational amplifier U21, and finally, the signals are output.

Further, the cascade output circuit further comprises a high-low filter circuit, the high-low filter circuit is connected with a node between the positive terminal of the operational amplifier U20 and the positive terminal of the operational amplifier U21, and the mixed audio signal can be filtered by the high-low filter circuit.

Further, the cascade output circuit further includes a mute circuit, the mute circuit is connected to a node between the resistor 114 and the output interface J27, and the mute circuit prevents sudden howling caused by audio insertion, that is, the mute circuit has an effect of resisting howling.

Compared with the prior art, the beneficial effects of the utility model are that:

through setting up the mixture and the difference of signal at the circuit, can realize cascade connection between the messenger a plurality of microphone receivers, need not to receive output device with a plurality of microphone receivers simultaneously on to reduce the degree of difficulty that certain wire rod and wire rod were arranged, when making the normal output of signal, the arrangement between the microphone receiver is more neat, the follow-up adjustment and the maintenance of being convenient for.

Drawings

Fig. 1 is a receiver connection diagram of a control circuit for a cascade output wireless microphone receiver according to the present invention.

Fig. 2 is an exploded view of a control circuit for a cascade output wireless microphone receiver according to the present invention.

Fig. 3 is a circuit diagram of a cascade input circuit for a control circuit of a cascade output wireless microphone receiver according to the present invention.

Fig. 4 is a circuit diagram of a cascade output circuit for a control circuit of a cascade output wireless microphone receiver according to the present invention.

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the same or similar reference numerals correspond to the same or similar parts; the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent.

Detailed Description

The present invention will be further described with reference to the following embodiments.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the drawings, the description is merely for convenience and simplicity of description, and it is not intended to indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, the terms describing the positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

Furthermore, if the terms "first," "second," and the like are used for descriptive purposes only, they are used for mainly distinguishing different devices, elements or components (the specific types and configurations may be the same or different), and they are not used for indicating or implying relative importance or quantity among the devices, elements or components, but are not to be construed as indicating or implying relative importance.

Examples

Referring to fig. 3 and 4, a control circuit for a cascade output wireless microphone receiver includes a control module, a power module, an antenna receiving module, a control module, an audio processing module, and a cascade transmission module, where the power module, the antenna receiving module, the control module, the audio processing module, and the cascade transmission module are all electrically connected to the control module; the cascade transmission module comprises a cascade input circuit and a cascade output circuit, the cascade input circuit is connected with the cascade output circuit, the cascade input circuit is used for filtering and eliminating redundant signal processing of audio signals, and then the cascade output circuit is used for audio mixing and audio differential processing, so that cascade audio signal transmission is realized.

It is clear from fig. 1 and fig. 2 how the microphone receivers are cascade-connected, the cascade connection can be realized through the input interface and the output interface of the adjacent microphone receivers, and finally the final microphone receiver is connected to the output device, and the mixed and differentiated audio is output.

In this embodiment, as can be seen from fig. 3, the cascade input circuit includes an input interface J8, a capacitor C360, a capacitor C361, a resistor R245, a resistor R261, and an operational amplifier U22-a, a positive input end of the input interface J8 is sequentially connected to one end of the capacitor C361 and one end of the resistor R245, the other end of the resistor R245 is connected to a positive end of the operational amplifier U22-a, a negative input end of the input interface J8 is sequentially connected to one end of the capacitor C360 and one end of the resistor R261, the other end of the resistor R261 is connected to a negative end of the operational amplifier U22-a, a ground end of the input interface J8 is grounded, the cascade input circuit further includes a capacitor C110, a resistor R250, a resistor R246, a capacitor C101, and a resistor R248, the capacitor C110 is connected in parallel to the resistor R250, two ends of the capacitor C110 are respectively connected to a negative end of the operational amplifier U22-a and an output end of the operational amplifier U35, One end of the capacitor C101 and one end of the resistor R248, the other end of the resistor R248 are grounded, a node between the capacitor C101 and the resistor R248 is connected with the cascade output circuit, and the audio signal is processed after entering; in addition, the cascade input circuit further comprises a capacitor C99, a resistor R249, an operational amplifier U22-B, a resistor R251 and a resistor R260, one end of the resistor R249 is connected with a node between the resistor R245 and the operational amplifier U22-B, the other end of the resistor R249 is sequentially connected with one ends of the operational amplifier U22-B, the resistor R251 and the resistor R260, the other end of the resistor R260 is connected with a power supply, the capacitor C99 is connected with the resistor R249 in parallel, specifically, that is, audio signals enter through an input interface J8, two paths of same audio signals enter an operational amplifier U22-A and an operational amplifier U22-B respectively, the signals entering the operational amplifier U22-A are subjected to signal amplification and filtering processing, and then are sent to a cascade output circuit for further processing, and the signal entering the operational amplifier U22-B is eliminated to avoid the influence of the same audio frequency.

The cascade input circuit further comprises an anti-interference circuit, the anti-interference circuit comprises a resistor R238, a capacitor C60, a resistor R87 and a capacitor C21, the resistor R87 is connected with the capacitor C21 in parallel, one ends of the resistor 87 and the capacitor C21 are grounded, and the other ends of the resistor R87 and the capacitor C21 are connected with the negative input end of the input interface J8; the resistor R238 and the capacitor C60 are connected in parallel, one end of the resistor R238 and one end of the capacitor C60 are both connected with the positive input end and the ground end of the input interface J8, the other ends of the resistor R238 and the capacitor C60 are both grounded, and the situation that the input audio signals are too much in mess can be effectively avoided through an anti-interference circuit.

In this embodiment, as can be seen from fig. 4, the cascade output circuit includes an operational amplifier U20, a resistor R105, a capacitor C252, a resistor R105, a resistor R107, an operational amplifier U21, a resistor R106, a capacitor C253, a capacitor C254, a resistor 114, and an output interface J27, the cascade input circuit is connected to the negative terminal of the operational amplifier U20, two ends of the resistor R105 are respectively connected to the negative terminal of the operational amplifier U20 and the output terminal of the operational amplifier U20, the capacitor C252 is connected in parallel to the resistor R105, two ends of the resistor R107 are respectively connected to the output terminal of the operational amplifier U20 and the negative terminal of the operational amplifier U21, two ends of the resistor R106 are respectively connected to the negative terminal of the operational amplifier U21 and the output terminal of the operational amplifier U21, the capacitor C253 is connected in parallel to the resistor R106, the positive terminal of the operational amplifier U20 is connected to the positive terminal of the operational amplifier U21, the output terminal of the operational amplifier, the plurality of audio signals are mixed by the operational amplifier U20 and then subjected to signal difference processing by the operational amplifier U21, and then outputted.

The cascade output circuit further comprises a high-low filter circuit, the high-low filter circuit is connected with a node between the positive electrode end of the operational amplifier U20 and the positive electrode end of the operational amplifier U21, and the high-low filter circuit is formed by electrically connecting components such as a capacitor C249, a capacitor C248, a resistor R103, a capacitor C250 and a capacitor C251, so that filtering processing of mixed audio is achieved.

The cascade output circuit further comprises a mute circuit, the mute circuit is connected with a node between the resistor 114 and the output interface J27, the mute circuit is electrically connected with components such as the triode Q7, the triode Q8, the triode Q9, the triode Q10, the resistor R110, the resistor R111, the resistor R112 and the resistor R113, as can be clearly understood from fig. 4, the mute circuit has the function of preventing the receiver from generating sudden howling when the receiver processes audio, namely avoiding audio impact sound possibly caused when the audio is accessed, and influencing subsequent audio.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A control circuit for a cascade output wireless microphone receiver is characterized by comprising a control module, a power supply module, an antenna receiving module, a control module, an audio processing module and a cascade transmission module, wherein the power supply module, the antenna receiving module, the control module, the audio processing module and the cascade transmission module are electrically connected with the control module; the cascade transmission module comprises a cascade input circuit and a cascade output circuit, and the cascade input circuit is connected with the cascade output circuit.

2. The control circuit of claim 1, wherein the cascade input circuit comprises an input interface J8, a capacitor C360, a capacitor C361, a resistor R245, a resistor R261 and an operational amplifier U22-a, a positive input terminal of the input interface J8 is connected to one ends of the capacitor C361 and the resistor R245 in sequence, the other end of the resistor R245 is connected to a positive terminal of the operational amplifier U22-a, a negative input terminal of the input interface J8 is connected to one ends of the capacitor C360 and the resistor R261 in sequence, the other end of the resistor R261 is connected to a negative terminal of the operational amplifier U22-a, and a ground terminal of the input interface J8 is grounded.

3. The control circuit of claim 2, wherein the cascade input circuit further comprises a capacitor C110, a resistor R250, a resistor R246, a capacitor C101, and a resistor R248, the capacitor C110 is connected in parallel with the resistor R250, two ends of the capacitor C110 are respectively connected to the negative terminal of the operational amplifier U22-a and the output terminal of the operational amplifier U22-a, the output terminal of the operational amplifier U22-a is sequentially connected to one end of the resistor R246, the capacitor C101, and the resistor R248, the other end of the resistor R248 is grounded, and a junction point between the capacitor C101 and the resistor R248 is connected to the cascade output circuit.

4. The control circuit for the cascade output wireless microphone receiver as claimed in claim 2, wherein the cascade input circuit further comprises an anti-jamming circuit, the anti-jamming circuit comprises a resistor R238, a capacitor C60, a resistor R87 and a capacitor C21, the resistor R87 and the capacitor C21 are connected in parallel, one end of the resistor 87 and one end of the capacitor C21 are both grounded, and the other end of the resistor R87 and the other end of the capacitor C21 are both connected to the negative input end of the input interface J8; the resistor R238 and the capacitor C60 are connected in parallel, one end of the resistor R238 and one end of the capacitor C60 are both connected with the positive input end and the ground end of the input interface J8, and the other ends of the resistor R238 and the capacitor C60 are both grounded.

5. The control circuit of claim 3, wherein the cascade input circuit further comprises a capacitor C99, a resistor R249, an operational amplifier U22-B, a resistor R251 and a resistor R260, wherein one end of the resistor R249 is connected to a node between the resistor R245 and the operational amplifier U22-B, the other end of the resistor R249 is connected to one end of the operational amplifier U22-B, the resistor R251 and the resistor R260 in sequence, the other end of the resistor R260 is connected to a power supply, and the capacitor C99 is connected in parallel with the resistor R249.

6. The control circuit of claim 1, wherein the cascade output circuit comprises an operational amplifier U20, a resistor R105, a capacitor C252, a resistor R105, a resistor R107, an operational amplifier U21, a resistor R106, a capacitor C253, a capacitor C254, a resistor 114 and an output interface J27, the cascade input circuit is connected to the negative terminal of the operational amplifier U20, the two terminals of the resistor R105 are respectively connected to the negative terminal of the operational amplifier U20 and the output terminal of the operational amplifier U20, the capacitor C252 is connected in parallel to the resistor R105, the two terminals of the resistor R107 are respectively connected to the output terminal of the operational amplifier U20 and the negative terminal of the operational amplifier U21,

two ends of the resistor R106 are respectively connected with the negative end of the operational amplifier U21 and the output end of the operational amplifier U21, the capacitor C253 is connected with the resistor R106 in parallel, the positive end of the operational amplifier U20 is connected with the positive end of the operational amplifier U21, and the output end of the operational amplifier U21 is sequentially connected with the capacitor C254, the resistor 114 and the output interface J27.

7. The control circuit of claim 6, wherein the cascade output circuit further comprises a high-low filter circuit connected to a junction between the positive terminal of the operational amplifier U20 and the positive terminal of the operational amplifier U21.

8. The control circuit for a cascade output wireless microphone receiver of claim 6 wherein the cascade output circuit further comprises a mute circuit, the mute circuit being connected to a junction between the resistor 114 and the output interface J27.