KR960004656B1 - Driving circuit for vcr with low voltage - Google Patents

Driving circuit for vcr with low voltage Download PDF

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Publication number
KR960004656B1
KR960004656B1 KR1019930022342A KR930022342A KR960004656B1 KR 960004656 B1 KR960004656 B1 KR 960004656B1 KR 1019930022342 A KR1019930022342 A KR 1019930022342A KR 930022342 A KR930022342 A KR 930022342A KR 960004656 B1 KR960004656 B1 KR 960004656B1
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South Korea
Prior art keywords
power
low voltage
terminal
cmos
vcr
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KR1019930022342A
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Korean (ko)
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KR950012369A (en
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박승득
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대우전자주식회사
배순훈
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Priority to KR1019930022342A priority Critical patent/KR960004656B1/en
Publication of KR950012369A publication Critical patent/KR950012369A/en
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Publication of KR960004656B1 publication Critical patent/KR960004656B1/en

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function

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  • Electronic Switches (AREA)

Abstract

The CMOS IC of a VCR is derived by low voltage by using the operating circuit so that the frequency characteristic of an analog signal is not degraded and the inverter becomes unnecessary. The 5V power of a microcomputer is supplied to a control terminal which selects an audio and a video signals transmitted from external terminal, and a power of -7V which is obtained by dividing -28V power by series resisters(R7,R8) is supplied to a VEE terminal.

Description

저전압을 이용한 브이씨알의 동작회로V-Cal Operation Circuit Using Low Voltage

제1도는 종래 브이씨알 외부신호 절환시 스위칭 IC의 회로도.1 is a circuit diagram of a switching IC when switching a conventional VR signal.

제2도는 본 발명에 의한 스위칭 IC의 회로도.2 is a circuit diagram of a switching IC according to the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

R7, R8: 저항R 7 , R 8 : resistance

본 발명은 브이씨알(VCR)에 관한 것으로, 특히, 인버터(Inverter)회로를 사용하지 않고 저전압 공급으로도 브이씨알 외부신호 절환시 브이씨알을 동작시킬 수 있게 하는 저전압을 이용한 브이씨알의 동작회로에 관한 것이다.The present invention relates to a VCR, and more particularly, to an operating circuit of a VC using a low voltage that enables the VC to operate when an external signal is switched by a low voltage supply without using an inverter circuit. It is about.

종래 브이씨알의 취급 주파수는 수 MHz의 높은 성분이므로 주파수 특성을 저하시키지 않기 위해서는 COMS IC의 전원 공급 전압이 높아야 하므로 제1도에 도시한 바와 같이 파우어 손실이 큰 12V를 공급했다.Since the handling frequency of V-C is a high component of several MHz, the power supply voltage of the COMS IC must be high in order not to deteriorate the frequency characteristic. Thus, as shown in FIG.

이 경우, 통상의 마이컴 IC는 5V 전원을 사용하기 때문에 트랜지스터(Q1)(Q2)와 저항(R1~R6)으로 된 인버터 회로(1)를 사용하여 5V의 마이컴 IC전원을 12V로 변화시켜 CMOS IC는 전원에 공급했다.In this case, since the conventional microcomputer IC uses a 5V power supply, the microcomputer IC power supply of 5V is set to 12V using an inverter circuit 1 composed of transistors Q 1 and Q 2 and resistors R 1 to R 6 . The CMOS IC was supplied to the power supply.

즉, 종래의 범용 CMOS IC는 전원 전압이 낮을수록 아날로그 특성이 나빠지는 결점이 있으므로 브이씨알 외부 입력신호의 주파수 특성을 저하시키지 않기 위해 인버터 회로(1)를 사용하여 12V 전원을 공급하였다.That is, the conventional general-purpose CMOS IC has a drawback that the analog characteristics deteriorate with a lower power supply voltage, so that the 12 V power is supplied using the inverter circuit 1 in order not to lower the frequency characteristic of the VSR external input signal.

따라서, 종래에는 별도의 인버터 회로(1)를 사용하므로 회로 구성이 복잡해지고 원가가 상승하는 결점이 있었다.Therefore, in the related art, since the separate inverter circuit 1 is used, the circuit configuration is complicated and the cost increases.

본 발명은 이와 같은 종래의 결점을 해결하기 위한 것으로, 인버터 회로를 사용하지 않고도 저전압을 이용하여 CMOS IC를 구동시킬 수 있는 회로를 제공하는데 그 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional drawback, and an object thereof is to provide a circuit capable of driving a CMOS IC using a low voltage without using an inverter circuit.

이와 같은 목적을 달성하기 위한 본 발명은 CMOS IC의 VEE단을 접지시키지 않고 저항을 통하여 저전압이 입력되게 하고, CMOS IC의 콘트롤 단자는 마이컴으로부터의 전원이 직접 공급되도록 접속하여서 된 것을 특징으로 한다.The present invention for achieving the above object is characterized in that the low voltage is input through the resistor without grounding the V EE stage of the CMOS IC, and the control terminal of the CMOS IC is connected so that the power from the microcomputer is directly supplied. .

이하, 본 발명의 실시예를 첨부된 도면을 참고로 하여 상세히 설명하면 다음과 같다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

제2도는 본 발명의 회로도로 CMOS IC의 오디오 외부 입력신호 단자 구성과 비디오 외부 입력신호 단자의 구성은 종래와 같으며, 상기 오디오 및 비디오 입력신호를 선택하도록 제어하는 콘트롤 단자는 마이컴의 5V 전원이 그대로 입력되도록 접속하고, VEE단자에는 파우어단에서 발생되어 디지트론을 구동시키기 위해 공급되는 -28V 전원이 병렬 접속된 저항(R7)(R8)을 통해 -7V로 공급되도록 접속하여서 된 것이다. 단, 상기 CMOS IC는 4채널 1출력이 페어(pair)로 구성된 스위칭 IC이다.2 is a circuit diagram of the present invention, the configuration of an audio external input signal terminal and a video external input signal terminal of a CMOS IC are the same as in the related art. The control terminal for controlling the audio and video input signals is selected from a 5V power supply of the microcomputer. It is connected so that it is input as it is, and the V EE terminal is connected so that -28V power generated at the power stage and supplied to drive the digitron is supplied at -7V through the parallel-connected resistor R 7 (R 8 ). . However, the CMOS IC is a switching IC composed of pairs of four channels of one output.

이와 같이 구성된 본 발명은 외부 입력신호의 아날로그 동작 전원은 VCC와 VEE단에 의하여 이루어지고, 콘트롤신호의 디지털 동작 전원은 V 콘트롤과 VSS단에 의하여 이루어진다.In the present invention configured as described above, the analog operating power of the external input signal is made by the V CC and V EE stages, and the digital operating power of the control signal is made by the V control and V SS stages.

이때, 파우어단에서 만들어져 디지트론을 구동시키기 위해 공급되는 -28V 전원이 저항(R7)(R8)에 의해 분압되어 -7V로 VEE에 입력되고 VCC단에는 5V 전원이 공급된다. 또한, 콘트롤 단자에는 마이컴으로부터 출력되는 5V 또는 0V 전원이 직접 입력된다.At this time, a -28V power supply made at the power stage and supplied to drive the digitron is divided by a resistor (R 7 ) (R 8 ) and input to V EE at -7V, and 5V power is supplied to the V CC stage. In addition, the 5V or 0V power output from the microcomputer is directly input to the control terminal.

따라서, 아날로그 전원단의 동작은 VCC-VEE즉, 5V-(-7V)=12V로서 동작하게 되고, 디지털 전원부, 즉 콘트롤부 V 콘트롤-VSS즉, 5V-0V=5V로서 동작하게 된다.Therefore, the operation of the analog power stage is operated as V CC -V EE, that is, 5V-(-7V) = 12V, and as a digital power supply, that is, as the control unit V control-V SS, that is, 5V-0V = 5V. .

이상과 같은 본 발명에 의하면 인버터 회로를 사용하지 않고 저전압에 의한 동작으로도 아날로그 신호의 주파수 특성을 열화시키지 않고 유지할 수 있으며, 외부 디바이스의 상이한 전압과도 매칭(Matching)이 가능한 효과가 있다.According to the present invention as described above, it is possible to maintain the frequency characteristics of the analog signal without deterioration even by operation under low voltage without using an inverter circuit, and matching with different voltages of an external device is possible.

Claims (1)

5V의 전원이 입력되는 VCC단자와; 저항(R7)(R8)을 통하여 분압된 -7V의 전원이 입력되는 VEE단자와; 마이컴에서 출력되는 전원이 입력되는 V콘트롤 단자를 CMOS IC에 구비시켜 브이씨알의 외부신호 절환시 저전압으로 상기 CMOS IC의 동작이 가능하도록 하되; 상기 VEE단자는 접지되지 않도록 구성하고; 상기 저항(R7)(R8)은 병렬 접속되고, 디지트론을 구동시키기 위한 -28V 전원이 입력되도록 구성한 것을 특징으로 하는 저전압을 이용한 브이씨알의 동작회로.A V CC terminal to which a 5 V power supply is input; A V EE terminal to which a divided -7V power supply is input through the resistors R 7 and R 8 ; A V control terminal to which the power output from the microcomputer is input is provided in the CMOS IC to enable operation of the CMOS IC at a low voltage when switching an external signal of V-CAL; The V EE terminal is configured not to be grounded; The resistors R 7 and R 8 are connected in parallel and are configured such that a -28 V power supply for driving a digitron is input thereto.
KR1019930022342A 1993-10-26 1993-10-26 Driving circuit for vcr with low voltage KR960004656B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930022342A KR960004656B1 (en) 1993-10-26 1993-10-26 Driving circuit for vcr with low voltage

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Application Number Priority Date Filing Date Title
KR1019930022342A KR960004656B1 (en) 1993-10-26 1993-10-26 Driving circuit for vcr with low voltage

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KR950012369A KR950012369A (en) 1995-05-16
KR960004656B1 true KR960004656B1 (en) 1996-04-11

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