KR20010044497A - Microphone transmitter-reciver consumed low power - Google Patents

Abstract

PURPOSE: A microphone transceiver consuming low power is provided to lighten the device, to prolong the battery life, to save power consumption, and to use the device both for single channel and phase locked-in loop modes. CONSTITUTION: In a control flow of transmission of a microphone transceiver consuming low power, a voice amplifier(12) amplifies the voice put in through a wireless microphone for transmission(5). An RF controller(18) condenses the voice signal receiving from the voice amplifier(12), modulates the condensed voice signal, change the latitude of the modulated signal, compares the latitude-changed signal with a reference data, and determines the carrier frequency of the modulated signal. A transmitter(22) amplifies the signal from the RF controller(18) to make a signal of high frequency. A 1.5V battery(10) supplies power to the device.

Description

Low Power Consumption Microphone Transceiver {MICROPHONE TRANSMITTER-RECIVER CONSUMED LOW POWER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low power consumption microphone transceiver, and in particular, a single channel using a low voltage (one 1.5V battery) to supply the operating power of a transmitter and a receiver using a low voltage (one 1.5V battery). The present invention relates to a power supply circuit of a microphone transceiver.

In general, a wireless microphone transmitter is used by an announcer of a broadcasting station, a talk show or other entertainment program, and is fixed to the waist of the human body using the transmitter's belt clip 8 to be fixed and extended by a lead line. In other words, the microphone or the microphone is configured to modulate the input voice signal in an RF (Radio Frequency) controller and then transmit the signal through a transmitter that amplifies the RF signal at a high frequency.

The RF controller is to solve the noise problem more completely through the COMPAN DOR and EXPANDOR that are connected in the integrated circuit, and the driving power is 5V DC, which consumes a lot of power. It was.

1 is an exploded perspective view of a conventional conventional microphone transmitter and a block diagram of a receiver, wherein a battery for operating power in using a wireless transceiver uses 3V, 4.5V, 6V, 9V, etc. in a power supply circuit of a wireless transceiver. Due to the battery's volume, there are various problems such as communication distance, sound quality and audio noise, as well as the volume and weight of the wireless transceiver.

In the conventional receiver, the receiver receives the transmitted radio waves and amplifies the radio waves received by the receiver, and then outputs them to a speaker. It is operated in a unidirectional channel method, in particular, the receiver is not composed of a small receiver as shown in Figure 1 receiver (receiver) 1 and amplifier (2) and the speaker (speaker) (receiving the transmitted radio waves) ( 3) Consists of a receiving system composed of a receiving system composed of a receiving system, so people who listen to the voice spoken through a microphone or a microphone must listen to the speaker of the receiving unit system that is fixed and operated in a fixed place without listening to earphones while moving. Only could hear the received voice.

The conventional receiving system configured as described above has not achieved the configuration of a compact compact receiver such as a transmitter.

Moreover, even the application of a compander (voice compression integrated circuit) and an expander (expander) (voice input integrated circuit), which are the life of a wireless transceiver, could not completely eliminate the problem of noise.

In addition, the battery consumption associated with the RF (Radio Frequency) output AF (AF) audio output was a problem, and the fatal problem of frequent replacement of the battery due to the short consumption time as well as the cost of the battery. there was.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to reduce the size and weight of a receiving system, such as a transmitter, comprising a receiver 1, an amplifier 2, and a speaker 3 for receiving transmitted radio waves. Configured receivers,

The present invention provides a low power consumption microphone transceiver power supply circuit that can operate a microphone transceiver power supply circuit using a 3 V or more battery for a power supply circuit with one 1.5 V battery, thereby extending the battery consumption time.

The stable DC voltage implemented in the above power supply circuit is used as the power supply voltage of the RF controller, and without using a COMPANDOR and an expander. In order to solve the noise problem more completely by providing a stabilization circuit in the power supply circuit, of course, the power supply voltage of the RF controller is set to a low voltage to implement a microphone transceiver which consumes less power.

In addition, another object of the present invention is applicable to both the wireless microphone (microphone) and the wireless channel (microphone) of the frequency band 10 MHZ ~ 1GHZ and the phase lock device (PLL: Phase Locked) (PLL) method It is to make it possible.

1 is an exploded perspective view of a conventional microphone transmitter and a block diagram of a receiver

2 is a state diagram of use of a low power consumption microphone transceiver according to the present invention;

3 is a block diagram illustrating a control flow of a low power consumption microphone transmitter according to an embodiment of the present invention.

4 is a block diagram showing a control flow of a low power consumption microphone receiver according to an embodiment of the present invention.

5A is a circuit diagram of a power supply unit of a low power consumption microphone transmitter according to an embodiment of the present invention.

5B is a circuit diagram of a power supply unit of a low power consumption microphone receiver according to an embodiment of the present invention.

6A is a battery operation state when a conventional 3V battery is used in a power supply circuit.

6B is a battery operation state when a conventional 9V battery is used in a power supply circuit.

6C is an operation state diagram when one 1.5V battery according to the present invention is used for a power supply circuit.

<Description of the reference numerals for the main parts of the drawings>

4: earphone 5: microphone (microphone)

8: belt clip 10: battery

12: Voice Amplifier (Transmitter) 15: LED (Light-Emitting Diode)

18: RF controller 20: ON / OFF switch

22 RF transmitter 25 antenna

28: RF receiver 32: receiver amplifier

50: integrated circuit for regulator (IC1) 52: integrated circuit for regulator (IC2)

55 power supply circuit 60 voltage stabilization circuit

70: LED (LED) 80: low band filter

90 filter unit 100 filter inductor

With reference to the accompanying drawings, a low power consumption type microphone transceiver according to the present invention will be understood by its embodiments described in detail below. 3 is a block diagram illustrating a control flow of a low power consumption microphone transmitter, FIG. 4 is a block diagram showing a control flow of a low power consumption microphone receiver, and FIG. 5 is a block diagram showing a control flow of a low power consumption microphone receiver. 5A is a circuit diagram of a power supply unit of a low power consumption microphone transmitter, and FIG. 5B is a circuit diagram of a low power consumption microphone receiver power supply unit.

3 is a block diagram illustrating a control flow of a low power consumption microphone transmitter, the transmitter compresses a voice signal through a voice amplifier 12 for amplifying a voice signal input to the wireless transmission microphone 5, a voice signal amplifier, The RF controller 18 and the frequency passed through the RF controller 18 determine the modulated high-frequency carrier frequency by adjusting the modulation and magnitude of the audio signal and comparing the reference data of the RF control unit. RF transmitter (22) to amplify a, and an antenna 25 and a power supply circuit for a transmitter for supplying power using a 1.5V battery (10).

4 is a block diagram illustrating a control flow of a low power consumption microphone receiver, in which the receiver receives an RF receiver 28 and a receiver amplifier 32 for receiving a high frequency signal induced by the antenna 35, and the intermediate part after frequency modulation. An RF controller 38 for demodulating the signal amplified to an audio signal, a voice amplifier 42 for amplifying the audio signal, and a receiver for supplying power using the earphone 4 and the 1.5V battery 10. It consists of a power supply circuit.

5A is a power supply circuit diagram of a low power consumption microphone transmitter. Referring to the basic configuration of the present invention, a low voltage 1.5V battery 10 for supplying a basic power supply voltage and an on-off power supply for the battery 10 are turned on. ON / OFF switch 10, power-up inductor 30, regulator integrated circuit (IC1) 50 for boosting the low voltage, reverse current prevention diode 40, and regulator IC1 (50) Voltage stabilizer used to make the voltage stepped up at the constant voltage, LED (LED1) control part to control the lighting and turn off of LED (LED) and low band filter to remove power noise caused by voltage rise and pass only low frequency (lowpass filter) 80, characterized in that.

FIG. 5B is a circuit diagram of a low power consumption microphone receiver power supply. Since the configuration of the receiver power supply circuit is substantially the same as the configuration of the power supply circuit of the transmitter, only portions having a difference in circuit configuration will be described in the following detailed description of the receiver power supply circuit. .

Referring to the detailed operation of the transceiver power supply circuit according to an embodiment of the present invention configured as described above are as follows.

FIG. 5A is a power supply circuit diagram of a low power consumption microphone transmitter. The battery 10 may be a low voltage battery 10 (generally 1.5V battery) that is commonly available. When the switch 1 (SW1) 20 of the power supply circuit is turned ON, the contacts 2 and 3 of the three contacts 1, 2, and 3 are connected, and a voltage of 1.5 V is applied to the circuit, and the switch (SW1) 20 When OFF is turned on, the first and second contacts of the three contacts 1, 2, and 3 are connected so that the voltage of the battery 10 is not applied, and thus the power supply circuit does not operate.

When the voltage of the battery 10 of the power supply circuit 1.5V is applied, a voltage is input to the regulator integrated circuit (IC1) 50 through the inductor L1 30 element, and the inductor L1 30 is connected to the battery 10. Only when the output voltage is 1.5V is applied to the pin 1 of the regulator integrated circuit (IC1) (50), the voltage rises by receiving only the basic power source of the constant voltage component. Since the inductor L1 30 has a very small impedance due to the voltage of the low frequency component, the voltage is applied to pin 1 with almost no voltage drop. It is a power-up coil that raises the voltage of the main power source while simultaneously reducing the voltage with a very large impedance, and raising the voltage of the main power source. It serves to supply power stably.

The regulator integrated circuit (IC1) 50 is a DC-DC voltage converter (DC-DC CONVERTER), and is an integrated circuit (IC: circuit) device for a power supply voltage raising circuit. In particular, PWM (Pulse Width Modulation: pulse width modulation) ) Is an integrated circuit that increases step by step. Therefore, the voltage passing through the inductor L1 (30) and the input voltage to the pin 1, 1.5V to boost the function to 3V, the pin 3 outputs the voltage 3V raised above and pin 2 is connected to ground.

Therefore, when the low voltage 1.5V is boosted to 3V, the other control unit to be described below uses a low voltage 1.5V according to the present invention as a power supply voltage by configuring a protection circuit to maintain the boosted voltage 3V at a constant DC 3V constant voltage. The power circuit of the model microphone transceiver is implemented.

After the regulator integrated circuit (IC1) 50, the voltage stabilization circuit unit 60 is formed by connecting the first capacitor (C1) and the second capacitor (C2) in parallel, the capacitor is impedance when the low frequency component When the impedance is very high and the high frequency component is a device having a basic characteristic having a small impedance, the voltage stabilization circuit unit 60 is a voltage output from pin 3 of the integrated circuit for regulator (IC1) 50. Since 3V is not an ideal voltage, two voltages of the first capacitor C1 and the second capacitor C2 stabilize the voltage and send the ripple component, that is, the high frequency voltage, to the ground. It acts as a kind of filter to protect the circuit and to supply power efficiently.

The diode D1 40 may send a reverse current when the voltage output from pin 3 of the regulator integrated circuit (IC1) 50 is lower than 1.5V, that is, the voltage input from the battery 10. At this time, the reverse current as described above is prevented by using the diode D1 40. The output voltage of pin 3 of regulator IC 50 is 3V, and the potential of 1.5V is higher than that of pin 1 of input voltage 1.5V. Diode D1 (40) is basically characterized in that when the voltage is 0.7V or more, current flows in the forward direction and cannot be conducted in the reverse direction so that reverse current does not flow. The voltage drop at pin 3 of the integrated circuit (IC1) 50 of the regulator may not flow when the reverse current flows from pin 3 of the regulator IC 3 to pin 1 due to a malfunction of the circuit or other devices. Contributes to stabilization. However, in general, when the regulator IC 50 is operating normally, the diode D1 40 is not conducting at all times because the voltage output from the third pin is higher than the voltage 1.5V input to the pin 1 of the regulator integrated circuit (IC1) 50. And the voltage 3V remains the same.

The LED 1 (LED 1) 15 control unit 70 configured for the LED 1 (LED 1) 15 on and off control unit is a voltage 3V from the regulator integrated circuit (IC 1) 50, the resistors R 1, R 2 and Voltage distribution is made to the resistance of R3. When 3V voltage is output from pin 3 of the regulator integrated circuit (IC1) 50, the node between R3 and R4 is about 0.75V according to the voltage division law [3V * {R3 / (R3 + R4)}]. The voltage is distributed. Accordingly, since a voltage of 0.7 V or more is applied between the base and the emitter of the transistor Q1, the transistor Q1 is turned on and the LED 1 (LED1) 15 is turned on. Otherwise, if Vbe (voltage between base and emitter) is less than 0.7V, transistor is not conducting (OFF: cut off), which makes the effect that LED1 (15) and ground are open. (LED1) 15 is turned off

The second inductor (L2) and the third capacitor (C3) constitutes a low pass filter (80) which is configured in series is connected to the low pass filter (lowpass filter 80) passes the desired low frequency This is to provide a selective size of the frequency, and to suppress the unnecessary frequency. Since there is almost no voltage drop in the second inductor L2, the low frequency is just passed and the third capacitor C3 is close to open. Naturally, + 3V is generated, and if a high frequency component comes in, the capacitor is closed and the voltage is close to 0V.

Therefore, the lowpass filter 80 serves to catch the ripple of the voltage by filtering to obtain a constant voltage of 3V. In particular, the inductor L2 absorbs power noise caused by a strong voltage rise. It acts as a filter to remove.

5B is a circuit diagram of a power supply unit of a low power consumption type microphone receiver according to an embodiment of the present invention. Since the power supply circuit portion of the receiver is substantially the same as the transmitter power supply circuit, only portions having a different circuit will be described in detail.

First, the low-frequency power-up inductor L3 input to the regulator integrated circuit (IC2) 52 plays the same role as the L1 (30) of the transmitter. The low frequency filtering by C5 filters the voltage ripple, and the resulting voltage drives LED2. Finally, the inductor L5 operates as an inductor with almost no impedance at low frequencies. The voltage of the high frequency component serves as a filter that does not pass.

The stable DC voltage 3V implemented in the power supply circuit is used as the power supply voltage of the RF2510 in the transmitter and the RF2917 in the receiver of the integrated circuit for RF, and the voltage 3V is the VCO of the transmitter. It is used as driving voltage of each stage control part of transceiver of phase synchronization loop (PLL), oscillator, audio amplifier, and reception level determiner. In doing so, all controls used for RF modulation operate at 3V low voltage. Therefore, the power consumption can be reduced.

As shown in FIGS. 6A, 6B, and 6C, the operation state of the low power consumption microphone transceiver according to the present invention is applied to a conventional 3V (1.5V-2) battery and a 9V battery. When compared with when using a 1.5V battery according to the present invention as follows.

6A is a diagram illustrating a battery operation when a conventional 3V (1.5V-2 battery) is used for a power supply circuit, and FIG. 6B is a diagram illustrating a battery operation when a conventional 9V battery is used for a power supply circuit. The operation state diagram when one 1.5V battery according to the present invention is used in the power supply circuit.

Figure 6a is an operating state diagram when using a 3V battery, the battery consumption time of the transmitter 110 is 5 hours, it can be seen that the battery consumption time 120 of the receiver is 4.5 hours, using one 9V battery of Figure 7b Compared with the battery consumption time of the operation state diagram when the transmission unit battery consumption time 130 is 5 hours battery consumption time 140 of the receiver can be seen that there is no significant difference in battery use time.

However, when a power circuit capable of driving a circuit is constructed using one 1.5V battery according to the present invention shown in FIG. 6C, the battery consumption time 150 of the transmitter is 7.5 hours and the receiver consumption time 160 is At 14 hours, the transmitter is 2.5 hours longer than the conventional 3V and 9V batteries, and the receiver can be used for about 10 hours longer.

As can be seen from the above description, when a power circuit capable of driving a circuit is constructed using one 1.5 V battery in a power circuit of a low power consumption microphone transceiver according to the present invention, a conventional 3V and 9V battery is used. The use time of the battery 10 is much longer than when used, but in the case of the receiver, the effect is thickened.

Therefore, in the present invention, the power circuit using a single 1.5V battery has a convenient effect of compacting and reducing the size of the wireless microphone transceiver and reducing the weight of the wireless microphone transceiver. In addition, it is easy to apply not only to the broadcasting station but also to the supervisor and the host in the field that requires special attention, such as a public theater, various entertainment establishments, or a security organization, by configuring the receiver in the same size as the transmitter. It is possible to have a convenient effect.

In addition, voltage stabilization circuits and low pass filters are added without the use of a compander (voice compression integrated circuit) and expander (expandor). It is a big effect that can solve the problem of noise more completely by configuring it.

In addition, the present invention is not only applicable to a single channel method of a wireless microphone and a wireless receiver in the frequency band 10MHZ ~ 1GHZ, but also easy to P.L. (Phase Locked-in Loop) method. There is an effect that can be applied.

Claims (6)

A microphone transmitter including a transmitter for modulating a voice signal input to a wireless microphone in an RF controller (RF integrated circuit) 18 and amplifying the voice signal at a high frequency; A microphone receiver comprising a voice amplifier for demodulating the audio signal from the RF controller 38 and amplifying the output audio signal, a battery 10 for supplying a basic power supply voltage, and the battery ( 10) an ON / OFF type switch 20 for applying or cutting power, a reverse current preventing diode 40, and an LED controller for controlling lighting and turning off of the LED ( In the conventional microphone transceiver provided with a power supply circuit section 55 is provided 70 for providing the operating power of the transceiver, A regulator integrated circuit (IC1) 50 having a function of boosting the voltage 1.5V applied from the battery 10 to 3V; A low power consumption type microphone transceiver comprising an integrated circuit for RF (RF) driven by a DC voltage of 3V boosted by the regulator integrated circuit (IC1). The low power consumption microphone transceiver according to claim 1, further comprising a voltage stabilization circuit 60 for maintaining a constant voltage output through the regulator integrated circuit (IC1) 50. 3. The voltage stabilization circuit 60 of claim 2, wherein the first capacitor C1 and the second capacitor C2 are connected in parallel to the 3V voltage output through the regulator integrated circuit (IC1) 50. Low power consumption microphone transceiver, characterized in that the protection circuit that removes the ripple component to efficiently supply power The low power filter of claim 1, further comprising a low band filter unit 80 configured to pass a low frequency of the voltage output through the regulator integrated circuit (IC1) 50 and to block unnecessary high frequency components. Consumer Microphone Transceiver The low-pass filter unit 80 of claim 4, the second inductor (L2) and the third capacitor (C3) is connected in series to the voltage output from the regulator integrated circuit (IC1) (50). Low power consumption microphone transceiver characterized by filtering to achieve a stable 3V constant voltage 5. The low power consumption microphone transceiver of claim 4, wherein the low band filter unit 80 removes noise generated by a voltage increase in the regulator integrated circuit (IC1) 50.