CN109615839B

CN109615839B - Coding chip and remote control device integrated with key power supply

Info

Publication number: CN109615839B
Application number: CN201811548014.1A
Authority: CN
Inventors: 石万文; 韩红娟; 李小安
Original assignee: SUZHOU HUAXIN MICRO-ELECTRONICS CO LTD
Current assignee: SUZHOU HUAXIN MICRO-ELECTRONICS CO LTD
Priority date: 2018-12-18
Filing date: 2018-12-18
Publication date: 2021-03-02
Anticipated expiration: 2038-12-18
Also published as: CN109615839A

Abstract

The invention discloses a coding chip integrating key power supply and a remote control device, wherein a key power supply module is integrated on the coding chip, the key power supply module comprises a power supply control module and a field effect transistor connected with the power supply control module, the power supply control module is connected with a key input end of the chip and is connected with a power supply positive end input end and a key power supply output end of the chip through the field effect transistor, and when any one or more of the key input ends detects that a key is pressed, the power supply control module transmits power to the key power supply output end through the field effect transistor to realize key power supply. The invention has the advantages of higher integration level, simpler system, high reliability, lower system cost, convenient wiring of the PCB, suitability for more remote controller shapes and the like.

Description

Coding chip and remote control device integrated with key power supply

Technical Field

The invention relates to a wireless remote control device, in particular to a coding chip integrated with key power supply and a remote control device.

Background

The wireless remote control device, which can be called as a wireless remote controller, adopts a 315M or 433.92M Hz frequency band as a carrier wave, modulates a coded signal and sends the modulated signal out through an antenna. The wireless receiving device realizes the purpose of remote control by receiving the corresponding frequency band signal and demodulating the corresponding signal.

Wireless remote control devices are typically battery powered and therefore require low power consumption. In order to achieve the purpose of low power consumption, a triode and some resistors are added outside a traditional coding chip of the traditional wireless remote control device to achieve the functions of key energization and key non-energization (no power consumption) of the remote control device, and the purpose of reducing the power consumption is achieved. According to the scheme, the triode and the resistors are added outside the chip, and the defects of multiple components, low reliability, high system cost, inconvenience in PCB wiring, limited appearance of the remote controller and the like exist.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides the coding chip and the remote control device which are high in integration level, high in reliability and concise in wiring and are powered by the integrated keys.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an encoding chip of integrated button power supply, encoding chip includes the power positive terminal input, button power supply output, the power negative terminal input of ground connection, code output and a plurality of button input, just it has button power supply module to integrate on the encoding chip, button power supply module includes power supply control module and the field effect transistor who links to each other with power supply control module, power supply control module links to each other with the button input, and passes through field effect transistor and chip the power positive terminal input links to each other with button power supply output, when arbitrary one or more in the button input detected the button and pressed, power supply control module passes through field effect transistor and sends the electricity to button power supply output, realizes the button power supply, button input terminal is to the corresponding coding information of button.

Preferably, the field effect transistor is a PMOS transistor, a gate of the PMOS transistor is connected to the power supply control module, a source of the PMOS transistor is connected to the power supply control module and the positive power input terminal of the chip, and a drain of the PMOS transistor is connected to the key power output terminal of the chip.

Preferably, the encoding chip comprises four key input ends, each key input end is connected with a key, the other end of each key is connected with the positive end of the power supply and the input end of the positive end of the power supply, and the negative end of the power supply is grounded.

The invention also discloses another technical scheme: a remote control device comprises the coding chip, a carrier code sending circuit, a voltage stabilizing circuit and a key code sending indicating circuit, wherein the carrier code sending circuit is connected with a key power supply output end and a coding output end of the coding chip, the voltage stabilizing circuit is connected to a circuit connected with the carrier code sending circuit and the key power supply output end, and the key code sending indicating circuit is connected with the coding output end.

Preferably, the carrier code sending circuit comprises a first resistor, a second resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, an NPN triode and an acoustic meter device, the first capacitor, the second capacitor and the first resistor are connected in parallel, one end of the first capacitor is grounded, the other end of the first capacitor is connected with the third capacitor in series, the other end of the third capacitor, the collector of the NPN triode and one end of the sound meter device are all connected with the key power supply output end, the emitter of the NPN triode is connected with the other end of the first resistor, the other end of the second capacitor is connected between the first capacitor and the third capacitor and is also connected with the emitter of the NPN triode, the other end of the sound meter device is connected with the base of the NPN triode and one end of the second resistor, the other end of the second resistor is connected with the coding output end, one end of the fourth capacitor is connected between the second resistor and the coding output end, and the other end of the fourth capacitor is grounded.

Preferably, the voltage stabilizing circuit comprises a fifth capacitor and a sixth capacitor connected in parallel, one end of the fifth capacitor and one end of the sixth capacitor are both grounded, and the other end of the fifth capacitor and the other end of the sixth capacitor are both connected to a line connecting the carrier code sending circuit and the key power supply output end.

Preferably, the key code sending indicating circuit comprises a third resistor and an LED indicator lamp which are connected in series, one end of the third resistor is connected between the second resistor and the code output end, the other end of the third resistor is connected with the positive end of the LED indicator lamp, and the negative end of the LED indicator lamp is grounded.

The invention has the beneficial effects that: the chip integrates the existing key power supply functional module, overcomes the defects of more components, low reliability, high system cost, inconvenient PCB wiring, limited appearance space of the remote controller and the like of the traditional chip and a remote control scheme formed by adopting the traditional chip, and has the advantages of higher integration level, simpler system, high reliability, low system cost, convenient PCB wiring, adaptability to more remote controller appearances and the like.

Drawings

FIG. 1 is a pin diagram of an encoding chip according to the present invention;

FIG. 2 is a schematic structural diagram of a key power supply module according to the present invention;

fig. 3 is a schematic view of the structure of the remote control device of the present invention.

Detailed Description

The technical solution of the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention.

As shown in fig. 1, the encoding chip with integrated key power supply disclosed in the embodiment of the present invention includes a plurality of pins, and in this embodiment, the encoding chip includes 8 pins (1, 2 … … 8), wherein, as shown in table 1 below, pin 1 is a positive power input terminal Vcc, pin 2 is a key power output terminal VDD, pin 3 is a negative power input terminal Vss connected to ground, pin 4 is an encoding output terminal TXD, and pins 5 to 8 are a key input terminal K0, a key input terminal K1, a key input terminal K2, and a key input terminal K3, respectively. Each key input terminal is connected with a key. Of course, this embodiment is only a specific example of the present invention and should not be construed as limiting the present invention. It is also within the scope of the invention to make appropriate changes, such as: partial pin order changes, changing pin names, increasing may reduce the number of key pins, etc.

	Name (R)	Description of the function
			1	Vcc	Positive terminal (+) input terminal of power supply
2	VDD	Power supply (+) output terminal of key
			3	Vss	Negative (-) input of power supply, normally grounded
4	TXD	Code output
			5	K0	Key input terminal 1
6	K1	Key input terminal 2
			7	K2	Key input terminal 3
8	K3	Key input terminal 4

TABLE 1 encoded chip pin description of the invention

Preferably, a key power supply module is integrated on the coding chip, in this embodiment, as shown in fig. 2, the key power supply module specifically includes a power supply control module and a field effect transistor connected to the power supply control module, where the power supply control module is connected to pins 5-8 and pin 3 of the coding chip, and the field effect transistor may be implemented by a PMOS transistor or an NMOS transistor, and in this embodiment, the PMOS transistor is used. The grid electrode of the PMOS tube is connected with the power supply control module, the source electrode of the PMOS tube is connected with the power supply control module and a pin 1 of the chip, namely a power supply positive end input end Vcc, and the drain electrode of the PMOS tube is connected with a pin 2 of the chip, namely a key power supply output end VDD.

The power supply principle of the key power supply module is as follows: when the module detects that any one or more keys in

chip pins

5, 6, 7 and 8 are pressed down, the power supply control module enables the grid of the PMOS1 tube to be at a low level, the PMOS tube is turned on, so that the electricity applied to pin 1 can be transmitted to pin 2, and the key power supply function is realized; when no key is pressed down, the power supply control module enables the grid of the PMOS1 tube to be at a high level, the PMOS tube is closed, the pin 2 is powered off, and meanwhile, the power supply control module does not consume power when no key is pressed down, so that the aim of low power consumption is fulfilled. In addition, compared with the traditional coding chip, the key power supply module is integrated on the chip, so that the purposes of higher integration level, simpler system, high reliability, lower system cost, convenient PCB wiring, adaptability to more remote controller shapes and the like are achieved.

As shown in fig. 3, a remote control device disclosed in the embodiment of the present invention includes the above-mentioned coding chip, a carrier code sending circuit, a voltage stabilizing circuit, and a key code sending indicating circuit, wherein the coding chip is the above-mentioned structure, and is not described herein again. The carrier wave code sending circuit is connected with the key power supply output end (namely pin 2) and the code output end (namely pin 4) of the code chip. In this embodiment, the carrier code sending circuit specifically includes: a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, an NPN triode and an acoustic meter device SAW, wherein the first capacitor C1, the second capacitor C2 and the first resistor R1 are connected in parallel, one end of the first capacitor C1 is grounded, the other end of the first capacitor C1 is connected in series with the third capacitor C3, the other end of the third capacitor C3, the collector of the NPN triode and one end of the acoustic meter device SAW are connected with a key power supply output end (namely pin 2), the emitter of the NPN triode is connected with the other end of the first resistor R1, the other end of the second capacitor C2 is connected between the first and third capacitors C1 and C3 and also connected with the emitter of the NPN triode, the other end of the acoustic meter device SAW is connected with the base of the NPN triode and one end of the second resistor R2, the other end of the second resistor R2 is connected with the coding output end (namely pin 364), one end of the fourth capacitor C4 is connected between the second resistor R2 and the coding, the other end is grounded.

In this embodiment, the voltage stabilizing circuit includes a fifth capacitor C5 and a sixth capacitor C6 connected in parallel, wherein one end of the fifth capacitor C5 and one end of the sixth capacitor C6 are both grounded, and the other ends are both connected to a line connecting the carrier code sending circuit and the key power supply output terminal (i.e., pin 2).

In this embodiment, the key code sending indicating circuit includes a third resistor R3 and an LED indicator lamp connected in series, wherein one end of the third resistor R3 is connected between the second resistor R2 and the code output terminal (i.e., pin 4), the other end is connected to the positive terminal of the LED indicator lamp, and the negative terminal of the LED indicator lamp is grounded.

The principle of the remote control device formed by the coding chip is as follows: when any one or more of the 4 keys K0, K1, K2 and K3 is pressed, the chip can supply positive voltage of the battery to a corresponding carrier code sending circuit through 2 pins of the chip, the pin 4 of the chip sends corresponding coded information according to the pressed key, and the coded information is sent out through the carrier code sending circuit consisting of resistors R1 and R2, capacitors C1, C2, C3 and C4, an NPN high-frequency triode and a sound meter device SAW through an antenna. The capacitors C5 and C6 stabilize the voltage. The resistor R3 and the LED lamp form a key code sending indicator lamp system, and when sending codes, the LED lamp is on; when the code is not sent, the LED lamp is not lighted. When no key is pressed down, the pin 2 of the chip is not powered, and the carrier code sending circuit is powered off. When no key is pressed down, the chip of the invention does not consume electricity, thus realizing the purpose of low power consumption.

Therefore, the scope of the present invention should not be limited to the disclosure of the embodiments, but includes various alternatives and modifications without departing from the scope of the present invention, which is defined by the claims of the present patent application.

Claims

1. An integrated key-powered encoding chip is characterized in that the encoding chip comprises a power supply positive end input end, a key-powered output end, a grounded power supply negative end input end, an encoding output end and a plurality of key input ends, and the coding chip is integrated with a key power supply module, the key power supply module comprises a power supply control module and a field effect transistor connected with the power supply control module, the power supply control module is connected with the input end of the key, and is connected with the input end of the positive end of the power supply and the output end of the key power supply of the chip through the field effect transistor, when any one or more of the key input ends detects that the key is pressed down, the power supply control module transmits power to the key power supply output end through the field effect transistor to realize key power supply, and the key input ends correspond to the coded information corresponding to the key.

2. The key-operated encoder chip of claim 1, wherein the field effect transistor is a PMOS transistor, the gate of the PMOS transistor is connected to the power supply control module, the source of the PMOS transistor is connected to the power supply control module and the positive power input terminal of the chip, and the drain of the PMOS transistor is connected to the key-operated power output terminal of the chip.

3. The key-powered encoder chip according to claim 1, wherein the encoder chip comprises four key inputs, each key input is connected to a key, and the other end of each key is connected to the positive power supply terminal and the positive power supply terminal, and the negative power supply terminal is connected to ground.

4. A remote control device, comprising the encoding chip of any one of claims 1 to 3, and a carrier code sending circuit, a voltage stabilizing circuit and a key code sending indicating circuit, wherein the carrier code sending circuit is connected to both the key power supply output end and the encoding output end of the encoding chip, the voltage stabilizing circuit is connected to a line connecting the carrier code sending circuit and the key power supply output end, and the key code sending indicating circuit is connected to the encoding output end.

5. The remote control device of claim 4, wherein the carrier code transmitting circuit comprises a first resistor, a second resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, an NPN triode, and an acoustic meter device, wherein the first capacitor, the second capacitor, and the first resistor are connected in parallel, one end of the first capacitor is connected to ground, the other end of the first capacitor is connected in series with the third capacitor, the other end of the third capacitor, a collector of the NPN triode, and one end of the acoustic meter device are connected to the key power supply output terminal, an emitter of the NPN triode is connected to the other end of the first resistor, the other end of the second capacitor is connected between the first capacitor and the third capacitor and is also connected to the emitter of the NPN triode, the other end of the acoustic meter device is connected to a base of the NPN triode and one end of the second resistor, the other end of the second resistor is connected to the code output terminal, and one end of the fourth capacitor is connected between, the other end is grounded.

6. The remote control device of claim 4, wherein the voltage regulator circuit comprises a fifth capacitor and a sixth capacitor connected in parallel, one end of each of the fifth capacitor and the sixth capacitor is grounded, and the other end of each of the fifth capacitor and the sixth capacitor is connected to a line connecting the carrier code sending circuit and the key power supply output terminal.

7. The remote control device of claim 4, wherein the key code emitting indicating circuit comprises a third resistor and an LED indicator lamp connected in series, one end of the third resistor is connected between the second resistor and the code output end, the other end of the third resistor is connected with the positive end of the LED indicator lamp, and the negative end of the LED indicator lamp is grounded.