CN210469720U

CN210469720U - Voice switch circuit and voice device

Info

Publication number: CN210469720U
Application number: CN201921695412.6U
Authority: CN
Inventors: 陈创海; 段苏敏; 徐成茂; 张胜勇
Original assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Priority date: 2019-10-11
Filing date: 2019-10-11
Publication date: 2020-05-05
Anticipated expiration: 2029-10-11

Abstract

The utility model provides a pronunciation switch circuit and voice device, wherein, pronunciation switch circuit includes: the action receiving unit is used for receiving the trigger action; the self-locking unit is electrically connected with the action receiving unit so as to generate a corresponding trigger pulse signal according to the trigger action, the self-locking unit comprises a trigger, the output end of the trigger outputs a level signal, and the trigger controls the level signal to turn over according to the trigger pulse signal so as to generate a reverse level signal; the reverse level signal is used for controlling the sound pick-up to be turned on or off. Through the technical scheme of the utility model, can reduce the probability that the third party passes through network cancellation silence function in order to acquire individual voice data, and then can promote voice switch control's reliability.

Description

Voice switch circuit and voice device

Technical Field

The utility model relates to a voice control technical field particularly, relates to a voice switch circuit and voice device.

Background

In the process of receiving the voice information, converting the voice information into the corresponding voice file and uploading the voice file to the remote server to receive the feedback information sent by the server according to the voice file, the risk that the voice file is intercepted and stolen to cause personal privacy disclosure exists.

In the related art, important information is prevented from being collected by setting a MIC mute function, specifically, one end of a mute key switch is electrically connected to a GPIO (General-purpose input/output) port of a main control MCU, when the mute key switch is pressed down, the MCU detects a level transition through the GPIO port, and then controls a MIC power switch through another GPIO port to cut off a voice signal input channel, but there are the following defects:

(1) the intruder can still send a mute canceling instruction to the MCU through the network, so that the mute canceling function can still acquire personal voice data under the condition that the user does not know;

(2) because the pickup power supply and the mute indicator light of the MIC microphone are controlled by different GPIOs, the state of the mute indicator light is inconsistent with the state of the MIC.

Disclosure of Invention

The present invention aims at least solving one of the technical problems existing in the prior art or the related art.

Therefore, an object of the present invention is to provide a voice switch circuit.

Another object of the present invention is to provide a speech device.

In order to achieve the above object, according to an embodiment of the first aspect of the present invention, there is provided a voice switch circuit including: the action receiving unit is used for receiving the trigger action; the self-locking unit is electrically connected with the action receiving unit so as to generate a corresponding trigger pulse signal according to the trigger action, the self-locking unit comprises a trigger, the output end of the trigger outputs a level signal, and the trigger controls the level signal to turn over according to the trigger pulse signal so as to generate a reverse level signal; the reverse level signal is used for controlling the sound pick-up to be turned on or off.

Among them, as understood by those skilled in the art, a flip-flop is a component for information storage having two stable states, which can record binary digital signals "0" and "1", and is a flip-flop that changes its output state by a pulse signal applied to an input terminal to realize inversion between two output states (i.e., "0" and "1" as described above).

In the above technical solution, the voice switch circuit further includes: and the switch unit comprises a first switch device, the input end of the first switch device is connected to the pickup power supply, the output end of the first switch device is connected to the pickup, the control end of the first switch device is connected to the output end of the trigger to receive the reverse level signal, and the first switch device enables the pickup power supply to supply power to the pickup or cuts off the pickup power supply according to the reverse level signal.

Wherein, the pickup power supply can be provided by a control chip of a voice system adopting the voice switch circuit.

In the technical scheme, the voice switch circuit for controlling whether the sound pick-up can normally receive the voice information comprises an action receiving unit, a self-locking unit and a switch unit, wherein the action receiving unit is used for receiving mute trigger action, the self-locking unit can realize a self-locking function according to the mute trigger action, and the realization mode is that the turnover of an originally output level signal is realized through a received mute trigger signal, for example, the level signal is turned over from a high level to a low level and from the low level to the high level, the level signal after the turnover is output to the switch unit so as to change the state of a first switch tube in the switch unit, namely, the on state is converted into the off state, and then the sound pick-up power supply stops supplying power to the connected sound pick-up (MIC), so that the sound pick-up can not receive the voice information any more, namely.

Wherein, adopt the trigger to replace little the control unit (MCU) among the correlation technique, the trigger triggers the state that the trigger pulse signal who forms changes the level signal of output through the trigger action, can send silence instruction (close the adapter promptly) or cancel the mode of silence instruction (open the adapter promptly) through the network among the correlation technique and compare, the utility model discloses in through improving voice switch control circuit, receive corresponding trigger action through action receiving element, control adapter switching on the one hand, need not carry out software detection and logic control operation, consequently can reduce the probability that the third party cancelled the silence function in order to acquire individual voice data through the network, and then can promote voice switch control's reliability.

In the above-described aspect, the action receiving unit includes: the first end of the switch structure is connected to the first power supply; the self-locking unit further includes: the first end of the first capacitor is connected to the second end of the switch structure, the second end of the first capacitor is connected to the first end of the first resistor, the switch structure responds to a trigger action to output a trigger pulse signal at the connection point of the first capacitor and the first resistor, and the pick-up is controlled to be turned on or turned off according to a reverse level signal correspondingly generated by the trigger pulse signal.

Specifically, if the sound pick-up is in an on state, the switch structure enables the first capacitor and the first resistor to be powered on and switched on by receiving the mute trigger action, so that a first trigger pulse signal is output at a connection point of the first capacitor and the first resistor, the reverse level signal generated by the first trigger pulse signal correspondingly controls the sound pick-up to be off, if the sound pick-up is in an off state, the switch structure enables the first capacitor and the first resistor to be powered off by receiving the sound pick-up trigger action, so that a second trigger pulse signal is output at the connection point of the first capacitor and the first resistor, and the reverse level signal generated by the second trigger pulse signal correspondingly controls the sound pick-up to be on.

In the technical scheme, the switch structure is a physical structure and is used for receiving external switch action, the trigger action is used for controlling the conduction or the cut-off of partial devices in the self-locking unit, the partial device comprises a first resistor and a first capacitor, wherein the first resistor and the first capacitor are combined with the first capacitor, according to the received switch action, the power is switched on or off to generate a trigger pulse signal at the moment of switching on or off, the output state of the trigger is changed by inputting the trigger pulse signal into the trigger in the self-locking unit, so that the first switch device in the switch unit for controlling the power supply to the sound pick-up is switched off or on to realize the power supply to the sound pick-up to make the sound pick-up work, or the power supply to the sound pickup is stopped to mute the sound pickup, and then the generation of the trigger pulse signal can be realized by adopting a simple circuit structure.

Specifically, the trigger actions include a mute trigger action and a sound pickup trigger action, when the mute trigger action is acquired, a corresponding first trigger pulse signal is generated to realize sound pickup mute based on the first trigger signal, when the sound pickup trigger action is acquired, a corresponding second trigger pulse signal is generated to realize sound pickup based on the second trigger pulse signal,

according to different setting rules of the switch structure and different connection modes of the first switch device, the reverse level signal correspondingly formed by the first pulse signal can be a high level signal, and the reverse level signal correspondingly formed by the second pulse signal can be a low level signal.

Or the inverted level signal formed corresponding to the first pulse signal may be a low level signal, and the inverted level signal formed corresponding to the second pulse signal may be a high level signal.

In any one of the above technical solutions, the self-locking unit further includes: and the filter is arranged between the switch structure and the first resistor and is used for executing jitter filtering operation on the pulse signal generated by the trigger action so as to enable the pulse signal to form a trigger pulse signal after passing through the first resistor.

In any one of the above solutions, the filter includes: and the first parallel ends of the second capacitor and the second resistor are connected to the second end of the switch structure, and the second parallel ends of the second capacitor and the second resistor are connected to the second end of the first resistor.

In the technical scheme, the pulse signal is subjected to jitter filtering by arranging the filter, so that signal jitter is reduced on one hand, the control precision of the control process from the trigger action to the trigger pulse signal to the reverse level signal is improved, and on the other hand, the probability of sound pick-up silence caused by no touch control can be reduced.

In any one of the above technical solutions, the self-locking unit further includes: and the first end of the third resistor is connected to the second parallel end, and the second end of the third resistor is connected to the second power supply through a third capacitor.

In this technical scheme, the self-locking unit still includes third resistance and third electric capacity of establishing ties, and third resistance and second resistance establish ties, and the third electric capacity is connected to the second power to in the same direction as the back that the switch structure is closed, can form the return circuit that switches on between first power and second power, in order to realize the transmission of trigger pulse signal.

In any one of the above solutions, the flip-flop includes: the first port is electrically connected with the switch unit and is marked as the output end of the trigger; a second port forming an anti-phase output with the first port; the third port is connected with a connection point of the first capacitor and the first resistor, is used for receiving a trigger pulse signal and is recorded as an input end of the trigger; the fourth port is connected with the second end of the third resistor; and the fifth port is connected with the second port, and when receiving the trigger pulse signal, the third port triggers the level of the first port to change into the level of the fifth port, namely the level of the second port, so that the level signal output by the first port is turned over according to the inverted phase output relation.

In the technical scheme, the ports of the trigger comprise a first port to a fifth port, different ports are correspondingly connected with other connection points of the self-locking unit, and one output port is connected to the switch unit, so that the first switch device is controlled to be switched on or switched off by outputting a level signal to the switch unit, and the mute mode or the sound pickup mode is controlled to be switched on.

In any one of the above solutions, the flip-flop includes: the sixth port and the seventh port are connected to the first parallel end, and the first parallel end is connected to the grounding end; the eighth port and the ninth port are connected to the ground terminal; and the tenth port and the eleventh port are connected to a third power supply.

In any one of the above technical solutions, the flip-flop includes a first flip-flop and a second flip-flop, where the first to seventh ports are disposed on the first flip-flop, and the eighth to eleventh ports are disposed on the second flip-flop.

In the related art, a common flip-flop chip is formed of two independent D flip-flop configurations, and thus one flip-flop includes fourteen ports as a whole.

In any one of the above technical solutions, the switch unit further includes: the light-emitting device and the second switch device which are connected in series are electrically connected with the output end of the trigger, the second switch device is conducted by the reverse level signal to light the light-emitting device, and the light-emitting device is used for indicating that the sound pick-up is in a mute state.

In the technical scheme, the switch unit further comprises a light emitting device and a second switch device, the light emitting device is specifically a light emitting diode, when the light emitting diode is turned on, the sound pick-up is indicated to be in a mute state, and the second switch device is controlled to be turned on or off so as to control the light emitting diode to be turned on or turned off.

Because the output end electricity of second switching device and trigger is connected, consequently the switching of first switching device and second switching device is controlled simultaneously to the output signal of trigger, compares with the mode that adopts different GPIO control different switching devices among the correlation technique, can reduce the inconsistent probability of silence pilot lamp state and adapter state, therefore can promote the accuracy of control.

In any of the above technical solutions, one of the first switching device and the second switching device is a P-channel MOS transistor, and the other is an N-channel MOS transistor.

In the technical scheme, one of the first switch devices is a P-channel MOS tube, the other one of the first switch devices is an N-channel MOS tube, when the same level signal is received, one of the first switch devices can be switched on, the other one of the first switch devices is switched off, so that when the sound pick-up enters a mute state, the mute indicator light is turned on, and when the sound pick-up enters the sound pick-up state, the mute is turned off in real time.

In any of the above technical solutions, the reverse level signal is a high level signal; the first switch device is a P-channel MOS tube, the S pole of the P-channel MOS tube is connected to the pickup power supply, the D pole of the P-channel MOS tube is connected to the output end of the pickup power supply, and the G pole of the P-channel MOS tube is connected to the output end of the trigger so as to cut off the first switch device by receiving a high-level signal; the switch unit further comprises a fourth resistor and a fourth capacitor, the fourth resistor is arranged between the S pole of the P-channel MOS tube and the output end of the trigger, and the fourth capacitor is arranged between the pickup power supply and the grounding end.

In any of the above technical solutions, the second switching device is an N-channel MOS transistor, an S-pole of the N-channel MOS transistor is grounded, a D-pole of the N-channel MOS transistor is connected to a negative pole of the light emitting device through a fifth resistor, an anode of the light emitting device is connected to a light emitting power supply, and a G-pole of the N-channel MOS transistor is connected to an output terminal of the trigger to turn on the first switching device by receiving a high level signal.

In the technical scheme, as a specific implementation manner, the first switch device is a P-channel MOS transistor, the second switch device is an N-channel MOS transistor, a source of the P-channel MOS transistor is connected to the input terminal, a drain of the P-channel MOS transistor is connected to the output terminal, and the connection manner of the N-channel MOS transistor is opposite, so when the mute trigger action is obtained and the output terminal of the trigger outputs a high level signal as a reverse level signal, the first switch device, i.e., the P-channel MOS transistor, is turned off, and the second switch device, i.e., the N-channel MOS transistor, is turned on, so that the sound pick-up is muted, and the mute indicator light is turned.

If the output end of the trigger outputs a low level signal as a reverse level signal, the first switch device, namely the P-channel MOS tube, is switched on, and the second switch device, namely the N-channel MOS tube, is switched off, so that the sound pick-up picks up sound, and the mute indicator lamp is switched off.

In any of the above technical solutions, the switch structure includes a key switch or a toggle switch.

The key switch receives touch operation as trigger action, and the toggle switch receives toggle operation as trigger action.

In any of the above technical solutions, the self-locking unit includes a self-locking key switch, the self-locking key switch includes a trigger, and the self-locking key switch is electrically connected to the action receiving unit and the switch unit, respectively.

According to the technical scheme of the second aspect of the utility model, a speech equipment is provided, include: the sound pick-up is used for receiving voice information; the voice switch circuit according to the first aspect is electrically connected to the sound pickup, and the voice switch circuit is configured to provide or cut off a sound pickup power supply of the sound pickup.

The embodiment of the utility model provides an in one or more technical scheme, following technological effect or advantage have at least:

(1) adopt the trigger to replace little the control unit (MCU) among the correlation technique, the trigger triggers the state that the level signal of output changes through the trigger pulse signal that forms, can send silence instruction (close the adapter promptly) or cancel the mode of silence instruction (open the adapter promptly) through the network among the correlation technique and compare, the utility model discloses in through improving voice switch control circuit, receive corresponding trigger action through action receiving element, control adapter switching on the one hand, need not carry out software detection and logic control operation, consequently can reduce the third party and cancel the probability of silence function in order to acquire individual voice data through the network, and then can promote voice switch control's reliability.

(2) The output signal of trigger controls the switching of first switching device and second switching device simultaneously, compares with the mode that adopts different GPIO control different switching devices among the correlation technique, can reduce the inconsistent probability of silence pilot lamp state and adapter state, therefore can promote the accuracy of control.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 shows a schematic block diagram of a voice switching circuit according to an embodiment of the present invention;

fig. 2 shows a circuit schematic of a voice switch circuit according to an embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Example one

As shown in fig. 1, the voice switch circuit according to an embodiment of the present invention includes: a motion receiving unit 102 and a self-locking unit 104.

The action receiving unit 102 is configured to receive a mute trigger action.

Specifically, the motion receiving unit 102 includes a switch structure including a key switch or a toggle switch.

The following describes an embodiment of the voice switch circuit of the present invention with a key switch as a switch structure.

And the self-locking unit 104 is electrically connected with the action receiving unit to generate a trigger pulse signal according to the trigger action, the self-locking unit 104 comprises a trigger U, the output end of the trigger U outputs a level signal, and the trigger U controls the level signal to turn over according to the trigger pulse signal so as to output a reverse level signal.

The self-locking unit 104 outputs a reverse level signal to achieve the self-locking function of the sound pickup.

Further, the voice switch circuit further includes: a switching unit 106.

As shown in fig. 2, the switching unit 106 includes a first switching device Q3, an input terminal of the first switching device Q3 is connected to the sound pickup power source VCC, an output terminal of the first switching device Q3 is connected to the sound pickup 20, and a control terminal of the first switching device Q3 is connected to an output terminal of the flip-flop U to receive a reverse level signal, wherein the first switching device Q3 makes the sound pickup power source VCC supply power to the sound pickup 20 or cuts off the sound pickup power source VCC according to the reverse level signal.

The switch unit 106, as a switch controller of the sound pickup 20, controls power supply to the sound pickup 20 or controls power off of the sound pickup 20 by receiving different level signals.

Based on the above circuit configuration, the sound pickup 20 is in an on state, the reverse level signal is used to control the sound pickup 20 to be off, the sound pickup 20 is in an off state, and the reverse level signal is used to control the sound pickup 20 to be on.

In which, as shown in fig. 2, a flip-flop U is a component for information storage having two stable states, and can record binary digital signals "0" and "1", and the flip-flop U is a flip-flop that changes its output state by a pulse signal applied to an input terminal to realize inversion between two output states (i.e., "0" and "1" as described above).

In this embodiment, the action receiving unit is configured to receive a mute trigger action, and the self-locking unit 104 is capable of implementing a self-locking function according to the mute trigger action.

The self-locking function is realized by receiving a mute trigger signal to flip an originally output level signal, for example, from a high level to a low level, from the low level to the high level, and outputting the flipped level signal to the switch unit 106.

The level signal after the inversion can change the state of the first switching device Q3 in the switching unit 106, i.e., from the on state to the off state, and then the sound pickup power supply VCC stops supplying power to the connected sound pickup 20(MIC), so that the sound pickup 20 cannot receive the voice information any more, i.e., enters the silent mode.

Wherein, adopt trigger U to replace little the control unit (MCU) among the correlation technique, trigger U triggers the state that the level signal of formation changes output through the trigger action, can send silence instruction (close adapter 20 promptly) or cancel the mode of silence instruction (open adapter 20 promptly) through the network among the correlation technique and compare, the utility model discloses in through improving voice switch control circuit, receive corresponding trigger action through the action receiving element, control adapter 20 switching on the one hand, need not carry out software detection and logic control operation, consequently can reduce the probability that the third party cancelled the silence function in order to acquire individual voice data through the network, and then can promote voice switch control's reliability.

The device arrangement in the voice switch circuit of the embodiments of the present invention is further described below.

As shown in fig. 2, in the above-described embodiment, the action receiving unit includes: the first end of the switch structure is connected to the first power supply; the self-locking unit 104 further includes: the first capacitor C1 and the first resistor R1, the first end of the first capacitor C1 is connected to the second end of the switch structure, and the second end of the first capacitor C1 is connected to the first end of the first resistor R1, wherein the switch structure responds to the trigger action to output a trigger pulse signal at the connection point of the first capacitor C1 and the first resistor R1, and controls the microphone 20 to be turned on or off according to the reverse level signal correspondingly generated by the trigger pulse signal.

During the operation of the sound pickup 20, if the sound pickup 20 is in the on state, the switch structure receives the mute trigger action to turn on the first capacitor C1 and the first resistor R1, so as to output a first trigger pulse signal at the connection point of the first capacitor C1 and the first resistor R1, the first trigger pulse signal generates a reverse level signal to control the sound pickup 20 to be turned off, and if the sound pickup 20 is in the off state, the switch structure receives the sound pickup trigger action to turn off the first capacitor C1 and the first resistor R1, so as to output a second trigger pulse signal at the connection point of the first capacitor C1 and the first resistor R1, and the second trigger pulse signal generates a reverse level signal to control the sound pickup 20 to be turned on.

The switch structure may be a key switch.

In this embodiment, the switch structure is a physical structure for receiving external switching actions, as a trigger action, the trigger action is used to control the on or off of some devices in the self-locking unit 104, the partial device comprises a first resistor R1 and a first capacitor C1, wherein the first resistor R1 and the first capacitor C1 are combined with the first capacitor C1, according to the received switch action, the power is switched on or off to generate a trigger pulse signal at the moment of switching on or off, by inputting a trigger pulse signal to the flip-flop U in the self-locking unit 104, the output state of the flip-flop U is changed, so that the first switching device Q3 in the switching unit 106, which controls the power supply to the sound pickup 20, is turned off or on, so that the power supply to the sound pickup 20 is realized to operate the sound pickup 20, or the power supply to the sound pickup 20 is stopped to mute the sound pickup 20, and then the generation of the trigger pulse signal can be realized with a simple circuit configuration.

Specifically, the trigger actions include a mute trigger action and a sound pickup trigger action, and when the mute trigger action is acquired, a corresponding first trigger pulse signal is generated to mute the sound pickup 20 based on the first trigger signal, and when the sound pickup trigger action is acquired, a corresponding second trigger pulse signal is generated to pick up sound by the sound pickup 20 based on the second trigger pulse signal,

according to different setting rules of the switch structure and different connection modes of the first switch device Q3, the inverted level signal correspondingly formed by the first pulse signal may be a high level signal, and the inverted level signal correspondingly formed by the second pulse signal may be a low level signal.

Example two

On the basis of the first embodiment, other devices such as a filter are further added, and the self-locking unit 104 further includes: and the filter is arranged between the switch structure and the first resistor R1 and is used for performing jitter filtering operation on the pulse signal generated by the trigger action so as to form a trigger pulse signal after passing through the first resistor R1.

As shown in fig. 2, in any of the above embodiments, the filter comprises: the first parallel ends of the second capacitor C2 and the second resistor R3, the second parallel ends of the second capacitor C2 and the second resistor R3 are connected to the second end of the switch structure, and the second parallel ends of the second capacitor C2 and the second resistor R3 are connected to the second end of the first resistor R1.

In this embodiment, the filter is arranged to perform jitter filtering on the pulse signal, so that on one hand, signal jitter is reduced, and further, the control accuracy of the control process from the trigger action to the reverse level signal through the trigger pulse signal is improved, and on the other hand, the probability of muting the sound pickup 20 due to no touch can be reduced.

In any of the above embodiments, the self-locking unit 104 further comprises: and a third resistor R2, wherein a first end of the third resistor R2 is connected to the second parallel end, and a second end of the third resistor R2 is connected to the second power supply through a third capacitor.

In this embodiment, the self-locking unit 104 further includes a third resistor R2 and a third capacitor connected in series, the third resistor R2 is connected in series with the second resistor R3, and the third capacitor is connected to the second power supply, so that after the switch structure is closed, a conductive loop can be formed between the first power supply and the second power supply, so as to implement the transmission of the trigger pulse signal.

The mute key switch SW adopts a normally open light touch key, one end of the mute key switch SW is connected with a power supply, and the other end of the mute key switch SW is connected with a first capacitor C1 to be used as a trigger source for generating a level pulse signal.

The trigger U in the self-locking unit 104 adopts a dual D-type trigger U, performs key jitter filtering through the second resistor R3 and the second capacitor C2, and the light touch switch SW is turned on each time, and a high-level pulse signal generated through the first capacitor C1 and the second capacitor C2 is used as a trigger pulse signal to turn over the level of the output end of the U.

EXAMPLE III

As shown in fig. 2, in any of the above embodiments, the flip-flop U includes: a first port (Q) electrically connected with the switch unit 106Connecting and recording as the output end of the trigger U; second port

Forming an anti-phase output with the first port; a third port (CP1) connected to a connection point of the first capacitor C1 and the first resistor R1, for receiving a trigger pulse signal; a fourth port (CD) connected to a second terminal of the third resistor R2; and a fifth port (D1) connected with the second port, wherein when the third port receives the trigger pulse signal, the level of the first port is triggered to change into the level of the fifth port, namely the level of the second port, and the level signal output by the first port is inverted according to the inverted phase output relation.

In this embodiment, the ports of the flip-flop U include a first port to a fifth port, and by connecting different ports to the other connection points of the self-locking unit 104 correspondingly, and connecting one output port to the switching unit 106, the first switching device Q3 is controlled to be turned on or off by outputting a level signal to the switching unit 106, so as to control to enter a mute mode or a sound pickup mode.

In any of the above embodiments, the flip-flop U comprises: the sixth port and the seventh port are connected to the first parallel end, and the first parallel end is connected to the grounding end; the eighth port and the ninth port are connected to the ground terminal; and the tenth port and the eleventh port are connected to a third power supply.

In any of the above embodiments, the flip-flop U includes a first flip-flop and a second flip-flop, wherein the first to seventh ports are provided on the first flip-flop, and the eighth to eleventh ports are provided on the second flip-flop.

In the related art, a common flip-flop U chip is formed by two independent D flip-flop U configurations, and thus one flip-flop U includes fourteen ports as a whole.

As shown in fig. 2, the self-locking unit 104 includes a trigger U, and the pin definitions of the trigger U are shown in table 1.

TABLE 1

Example four

As shown in fig. 2, the self-locking unit 104 includes a trigger U, and the switching unit 106 includes a pickup power VCC and a first switching device Q3.

The action receiving unit includes: the mute key switch and the first power supply, wherein the first end of the switch structure is connected to the first power supply; the self-locking unit 104 further includes: a first capacitor C1 and a first resistor R1, a first terminal of the first capacitor C1 is connected to the second terminal of the switch structure, and a second terminal of the first capacitor C1 is connected to the first terminal of the first resistor R1.

The self-locking unit 104 further includes: the first parallel ends of the second capacitor C2 and the second resistor R3, the second parallel ends of the second capacitor C2 and the second resistor R3 are connected to the second end of the switch structure, and the second parallel ends of the second capacitor C2 and the second resistor R3 are connected to the second end of the first resistor R1.

The self-locking unit 104 further includes: and a third resistor R2, wherein a first end of the third resistor R2 is connected to the second parallel end, and a second end of the third resistor R2 is connected to the second power supply through a third capacitor.

The switching unit 106 further includes: the light emitting device LED and the second switching device Q4 are connected in series, the second switching device Q4 is electrically connected to the output terminal of the trigger U, and the reverse level signal turns on the second switching device Q4 to turn on the light emitting device LED, which is used to indicate that the microphone 20 is in a mute state.

In this embodiment, the switch unit 106 further includes a light emitting device LED, specifically a light emitting diode, which indicates that the microphone 20 is in a mute state when the light emitting diode is turned on, and a second switch device Q4 for controlling the light emitting diode to be turned on or off by controlling the second switch device Q4 to be turned on or off.

Because the second switching device Q4 is electrically connected with the output end of the trigger U, the output signal of the trigger U simultaneously controls the on/off of the first switching device Q3 and the second switching device Q4, and compared with the mode that different switching devices are controlled by different GPIOs in the related art, the probability that the state of the mute indicator light is inconsistent with the state of the sound pick-up 20 can be reduced, and therefore the accuracy of control can be improved.

In any of the above embodiments, one of the first switching device Q3 and the second switching device Q4 is a P-channel MOS transistor, and the other is an N-channel MOS transistor.

In this embodiment, one of the first switching devices Q3 is a P-channel MOS transistor, and the other is an N-channel MOS transistor, so that when receiving the same level signal, one of them can be turned on and the other can be turned off, so that when the sound pickup 20 enters a mute state, the mute indicator lamp is turned on, and when the sound pickup 20 enters a sound pickup state, the mute is turned off in real time, and the like.

The reverse level signal is a high level signal; the first switching device Q3 is a P-channel MOS tube, the S pole of the P-channel MOS tube is connected to the input end of a pickup power supply VCC, the D pole of the P-channel MOS tube is connected to the output end of the pickup power supply VCC, and the G pole of the P-channel MOS tube is connected to the output end of the trigger U, so that the first switching device Q3 is cut off by receiving a high level signal; the switch unit further comprises a fourth resistor R5 and a fourth capacitor C4, the fourth resistor R5 is arranged between the S pole of the P-channel MOS transistor and the output end of the trigger U, and the fourth capacitor C4 is arranged between the input end of the pickup power supply VCC and the ground end.

In any of the above embodiments, the second switching device Q4 is an N-channel MOS transistor, the S-pole of the N-channel MOS transistor is grounded, the D-pole of the N-channel MOS transistor is connected to the cathode of the light emitting device LED through the fifth resistor R4, the anode of the light emitting device LED is connected to the light emitting power supply, and the G-pole of the N-channel MOS transistor is connected to the output terminal of the flip-flop U, so as to turn on the first switching device Q3 by receiving a high-level signal.

In this embodiment, as a specific implementation manner, the first switching device Q3 is a P-channel MOS transistor, the second switching device Q4 is an N-channel MOS transistor, a source of the P-channel MOS transistor is connected to the input terminal, a drain of the P-channel MOS transistor is connected to the output terminal, and the connection manner of the N-channel MOS transistor is opposite, so when the mute trigger action is obtained and the output terminal of the flip-flop U outputs a high level signal as a reverse level signal, the first switching device Q3, i.e., the P-channel MOS transistor, is turned off, the second switching device Q4, i.e., the N-channel MOS transistor, is turned on, so as to mute the sound pickup 20, and turn on the mute indicator light.

If the output end of the trigger U outputs a low level signal as a reverse level signal, the first switching device Q3, i.e., the P-channel MOS transistor, is turned on, and the second switching device Q4, i.e., the N-channel MOS transistor, is turned off, so that the sound pickup 20 picks up sound, and the mute indicator lamp is turned off.

At the moment when the voice switch circuit is powered on, because the key switch is in an off state, the second power supply VIN generates a high-level pulse signal to reset the trigger U through the third capacitor and the third resistor R2 by utilizing the characteristic that the voltage at two ends of the capacitor can not suddenly change, so that the initialization state Q1 of the trigger U is ensured to be 0, at this moment, the power supply of the sound pick-up 20 is in an on state, and the sound pick-up 20 normally works.

As shown in FIG. 2, the flip-flop U is composed of two identical, independent D-type flip-flops, each having independent data, set, reset, clock inputs and Q and

and an output pin, wherein when the output Q is triggered at the rising edge of the clock CP, the logic level added at the D input end is transmitted to the Q output end. The set and reset are clock independent and active high.

Table 2 shows a truth table for flip-flop U

TABLE 2

Further, after the power-on is completed, the set S and the reset R are both low, and referring to the truth table 2, the port Q can be changed to the input value of the D port only when CL is in the time rising edge state.

When the SW is pressed, the on time is about 150ms, the jitter time is about 20ms. to avoid the jitter misjudgment, the key hardware jitter elimination is performed through the second capacitor C2 and the second resistor R3 to form a discharging loop, and the first power source VIN is connected to the end through the first capacitor C1 and the first resistor R1The port CP1 generates a high-level pulse, the discharge time τ ≈ R1C1 ≈ 100nf ═ 100K ═ 10ms, and the input port D1 is connected to the inverting output port

In contrast to port Q1, port Q1 is level flipped.

The mute indicator light and the power switch of the sound pick-up 20 are controlled by MOS tubes, and the control logics of the mute indicator light and the power switch are opposite.

When the voice device normally works, the output level of the port Q1 is low, the PMOS transistor Q3, VGS < 0, DS is turned on, and provides the sound pickup 20 with working power, and meanwhile, the NMOS transistor Q4, VGS ═ 0, DS is turned off, the mute indicator light is not on, and the user is prompted to turn on the mute function.

After the SW button is triggered, the Q3 level is turned over and outputs a high level, an NMOS tube Q4 of the mute indicator light is turned on, VGS >0, DS is turned on, the indicator light is turned on, the mute function is reminded of working, meanwhile, Q2VGS is larger than or equal to 0, DS is turned off, the MIC power supply is turned off, and the MIC receiving is guaranteed to be in an invalid state.

When the next key is pressed, the self-locking unit 104 turns over to output a low level, the mute function is unlocked, the MIC function is recovered, and the mute indicator lamp is turned off.

In any of the above embodiments, the self-locking unit 104 comprises a self-locking key switch including a trigger, and the self-locking key switch is electrically connected to the action receiving unit and the switch unit 106, respectively.

According to the utility model discloses a speech equipment of embodiment includes: the sound pick-up is used for receiving voice information; the voice switch circuit of the embodiment of the first aspect is electrically connected to the sound pickup, and the voice switch circuit is configured to supply or cut off a sound pickup power supply of the sound pickup to receive voice information through the sound pickup, or cut off a power supply of the sound pickup to stop the sound pickup from receiving voice information.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.

While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.

Obviously, various modifications and changes may be made by those skilled in the art without departing from the scope of the present invention and its equivalents, and it is intended that the present invention also include such modifications and changes.

Claims

1. A voice switch circuit, comprising:

the action receiving unit is used for receiving a trigger action;

the self-locking unit is electrically connected with the action receiving unit so as to generate a corresponding trigger pulse signal according to the trigger action, the self-locking unit comprises a trigger, the output end of the trigger outputs a level signal, and the trigger controls the level signal to turn over according to the trigger pulse signal so as to generate a reverse level signal;

the reverse level signal is used for controlling the sound pick-up to be turned on or off.

2. The voice switch circuit of claim 1, further comprising:

a switching unit including a first switching device, an input end of the first switching device being connected to a sound pickup power source, an output end of the first switching device being connected to the sound pickup, a control end of the first switching device being connected to an output end of the trigger to receive the reverse level signal,

wherein the first switching device causes the sound pickup power supply to supply power to the sound pickup or cuts off the sound pickup power supply in accordance with the reverse level signal.

3. The voice switch circuit of claim 2,

the action receiving unit includes: the first end of the switch structure is connected to the first power supply;

the self-locking unit further comprises: a first capacitor and a first resistor, a first terminal of the first capacitor is connected to the second terminal of the switch structure, a second terminal of the first capacitor is connected to the first terminal of the first resistor,

the switch structure responds to the trigger action to output a trigger pulse signal at a connection point of the first capacitor and the first resistor, and controls the microphone to be switched on or switched off according to the reverse level signal correspondingly generated by the trigger pulse signal.

4. The voice switch circuit of claim 3, wherein the self-locking unit further comprises:

and the filter is arranged between the switch structure and the first resistor and is used for executing jitter filtering operation on the pulse signal generated by the trigger action so as to enable the pulse signal to form the trigger pulse signal after passing through the first resistor.

5. The voice switch circuit of claim 4, wherein the filter comprises:

the first parallel ends of the second capacitor and the second resistor are connected to the second end of the switch structure, and the second parallel ends of the second capacitor and the second resistor are connected to the second end of the first resistor.

6. The voice switch circuit according to claim 5, wherein the self-locking unit further comprises:

and a first end of the third resistor is connected to the second parallel end, and a second end of the third resistor is connected to a second power supply through a third capacitor.

7. The voice switch circuit of claim 6, wherein the trigger comprises:

the first port is electrically connected with the switch unit and is marked as the output end of the trigger;

a second port forming an anti-phase output with the first port;

a third port, connected to a connection point of the first capacitor and the first resistor, for receiving the trigger pulse signal and recording as an input terminal of the trigger;

a fourth port connected to a second end of the third resistor;

and the third port triggers the level of the first port to change into the level of the fifth port, namely the level of the second port when receiving the trigger pulse signal, and the level signal output by the first port is turned over according to the inverted phase output relation.

8. The voice switch circuit according to any one of claims 2 to 7, wherein the switch unit further includes:

the light emitting device and the second switch device of establishing ties, the second switch device with the output electricity of trigger is connected, reverse level signal makes the second switch device switches on to light the light emitting device, the light emitting device is used for instructing the adapter is in the silence state.

9. The voice switch circuit of claim 8,

one of the first switch device and the second switch device is a P-channel MOS tube, and the other one is an N-channel MOS tube.

10. The voice switch circuit of claim 9,

the reverse level signal is a high level signal;

the first switching device is a P-channel MOS tube, the S pole of the P-channel MOS tube is connected to the pickup power supply, the D pole of the P-channel MOS tube is connected to the output end of the pickup power supply, and the G pole of the P-channel MOS tube is connected to the output end of the trigger, so that the first switching device is cut off by receiving the high-level signal;

the switch unit further comprises a fourth resistor and a fourth capacitor, the fourth resistor is arranged between the S pole of the P-channel MOS tube and the output end of the trigger, and the fourth capacitor is arranged between the pickup power supply and the grounding end.

11. The voice switch circuit of claim 10,

the second switch device is an N-channel MOS tube, the S pole of the N-channel MOS tube is grounded, the D pole of the N-channel MOS tube is connected to the negative pole of the light-emitting device through a fifth resistor, the positive pole of the light-emitting device is connected to a light-emitting power supply, and the G pole of the N-channel MOS tube is connected to the output end of the trigger so as to enable the first switch device to be conducted through receiving the high-level signal.

12. The voice switch circuit of claim 2,

the self-locking unit comprises a self-locking key switch, the self-locking key switch comprises the trigger, and the self-locking key switch is respectively and electrically connected with the action receiving unit and the switch unit.

13. A speech device, comprising:

the sound pick-up is used for receiving voice information;

the voice switch circuit according to any one of claims 1 to 12, electrically connected to the sound pickup, for supplying or cutting off a sound pickup power source of the sound pickup.