KR910008619Y1 - Stand-by voltage generating circuit - Google Patents

Stand-by voltage generating circuit Download PDF

Info

Publication number
KR910008619Y1
KR910008619Y1 KR2019880008545U KR880008545U KR910008619Y1 KR 910008619 Y1 KR910008619 Y1 KR 910008619Y1 KR 2019880008545 U KR2019880008545 U KR 2019880008545U KR 880008545 U KR880008545 U KR 880008545U KR 910008619 Y1 KR910008619 Y1 KR 910008619Y1
Authority
KR
South Korea
Prior art keywords
voltage
camera
heater
transistor
pickup tube
Prior art date
Application number
KR2019880008545U
Other languages
Korean (ko)
Other versions
KR900001967U (en
Inventor
노영수
Original Assignee
삼성전자 주식회사
안시환
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 삼성전자 주식회사, 안시환 filed Critical 삼성전자 주식회사
Priority to KR2019880008545U priority Critical patent/KR910008619Y1/en
Publication of KR900001967U publication Critical patent/KR900001967U/en
Application granted granted Critical
Publication of KR910008619Y1 publication Critical patent/KR910008619Y1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/65—Control of camera operation in relation to power supply

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)

Abstract

내용 없음.No content.

Description

연산증폭기를 이용한 대기전압 발생회로Standby voltage generation circuit using operational amplifier

제1도는 본 고안의 회로도.1 is a circuit diagram of the present invention.

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

10 : 카메라 픽업 튜브 OP1 : 연산 비교증폭기10: camera pickup tube OP1: operational comparison amplifier

TR1 : 트랜지스터 R1, R3 : 저항TR1: transistor R1, R3: resistor

D1 : 다이오드D1: diode

본 고안은 대기(STAND BY) 전압 발생회로에 관한 것으로 특히 방송용 카메라나 모니터 등에서 픽업 튜브(PICK-UP TUBE)의 히터(HEATER) 전압공급을 위해 연산증폭기를 이용한 대기전압 발생회로에 관한 것이다.The present invention relates to a standby voltage generator circuit, and more particularly, to a standby voltage generator circuit using an operational amplifier for supplying a heater voltage of a pick-up tube in a broadcast camera or a monitor.

종래에 방송용 카메라나 모니터 등에서 이들이 동작하지 않을 때 히터에 전압이 인가되지 않으므로 카메라 셀렉션(SELECTION)시 카메라의 픽업 튜브에 인가되어 히터전압이 오랜시간이 소요되어 화면의 안정타임이 너무 길게되는 문제점이 있었다.In the conventional broadcast cameras and monitors, when they do not operate, the voltage is not applied to the heater, so when the camera selection is applied to the pickup tube of the camera, the heater voltage takes a long time and the stability time of the screen is too long. there was.

본 고안은 상기와 같은 문제점을 해결하기 위하여 안출한 것인바, 카메라가 동작하지 않을 때에도 일정한 히터전압을 인가하기 위하여 연산증폭기를 이용 전압을 비교검사하고 이 비교검사된 전압값에 따라 일정전압이 항상 히터에 인가되도록 함을 그 목적으로 한 것으로 이하 첨부된 도면에 의하여 본 고안을 상세히 설명하면 다음과 같다.The present invention has been devised to solve the above problems. In order to apply a constant heater voltage even when the camera does not operate, the operational voltage is compared and inspected, and the constant voltage is always in accordance with the compared voltage value. When the present invention is described in detail with reference to the accompanying drawings to be applied to the heater as follows.

제1도는 본 고안의 회로도로서 연산증폭기(OP1)의 반전단자(-)에 입력전압(V1)을 접속하되 비반전단자(+)에는 기준전압(VRef)을 접속하고 상기 연산증폭기(OP1)에 구동(OP1)에 구동전압(+VO), (-VO)을 접속하며 출력단에는 저항(R3)을 통하여 스위칭 트랜지스터(TR1)의 베이스에 접속한다.FIG. 1 is a circuit diagram of the present invention, in which an input voltage V 1 is connected to an inverting terminal (-) of an operational amplifier OP1, while a reference voltage V Ref is connected to a non-inverting terminal (+), and the operational amplifier OP1 is connected. Is connected to the driving voltage (+ VO) and (-VO) to the drive OP1 and to the base of the switching transistor TR1 through the resistor R3 at the output terminal.

상기 트랜지스터(TR1)의 에미터는 접지시작되 콜렉터는 카메라 픽업 튜브(10)의 타측에 접속하며 상기 카메라 픽업튜브(10)의 일측에는 상기 입력전압(V1)을 접속하되 저항(R1), (R2)을 연결하여 전압분배를 하도록 하고 상기 저항(R1), (R2)과 트랜지스터(TR1) 콜렉터 사이에 부귀환 방지용 다이오드(D1)를 접속한다.The emitter of the transistor TR1 is grounded, and the collector is connected to the other side of the camera pickup tube 10, and the input voltage V 1 is connected to one side of the camera pickup tube 10. R2) is connected to perform voltage distribution, and a negative feedback preventing diode D1 is connected between the resistors R1 and R2 and the transistor TR1 collector.

이하 이들의 작용효과를 설명한다.The effect of these will be described below.

카메라의 정상동작시 제1도의 입력전압(V1)과 기준전압(VRef)의 관계에서 입력전압이 기준전압보다 크므로 연산 비교증폭기(OP1)의 출력은 로우전압이 되고 이 로우전압은 저항(R3)을 통하여 트랜지스터(TR1)의 베이스에 인가되어 상기 트랜지스터(TR1)를 오프시키며 상기 트랜지스터(TR1)가 오프되면 콜렉터와 다이오드(D1)의 접점전위(a)는 저항(R1), (R2)의 분배된 전압이 걸리게 되면 이 분배된 전압에 의해 히터의 전압(VH)은 상기 입력전압과 접점(a) 전압의 차(VH=VI-Va)로서 결정된다. 상기 카메라가 동작하지 않을때는 상기 입력전압이 기준전압보다 적게되어 연산비교증폭기(OP1)의 출력은 하이전압이 되고 이 하이전압은 상기 저항(R3)을 통하여 트랜지스터(TR1)의 베이스에 인가되므로 상기 트랜지스터(TR1)는 온된다.In normal operation of the camera, since the input voltage is greater than the reference voltage in the relationship between the input voltage V 1 and the reference voltage V Ref in FIG. 1 , the output of the operation comparison amplifier OP1 becomes a low voltage and the low voltage is a resistance. It is applied to the base of the transistor TR1 through R3 to turn off the transistor TR1. When the transistor TR1 is turned off, the contact potential a of the collector and the diode D1 becomes a resistor R1, R2. When the divided voltage of) is applied, the voltage V H of the heater is determined as the difference (V H = V I −V a ) between the input voltage and the voltage of the contact (a). When the camera is not operated, the input voltage is lower than the reference voltage so that the output of the operational comparison amplifier OP1 becomes a high voltage and the high voltage is applied to the base of the transistor TR1 through the resistor R3. Transistor TR1 is turned on.

상기 트랜지스터(TR1)가 온되면 상기 접점전위(a)는 제로("O")가 되므로 상기 히터전압(VH)은 입력전압(V1)과 같게된다.When the transistor TR1 is turned on, the contact potential a becomes zero (“O”), so the heater voltage V H becomes equal to the input voltage V 1 .

한편 상기 저항(R1), (R2) 값은 카메라가 정상 동작시나 동작하지 않을 때에도 일정한 히터전압을 공급하기 위하여 정상동작과 동작하지 않을때의 인가전압의 차전압 [VDI=VI(정상)-VI(비정상)]이 상기 정상작시이 접점전압(Va)이 되도록 세팅시킨다.On the other hand, the resistance (R1), (R2) value is the difference voltage of the applied voltage when the normal operation and non-operation to supply a constant heater voltage even when the camera is in normal operation or inactive [V DI = V I (normal) -V I (abnormal)] is set so that the normal operation is the contact voltage (V a ).

이상에서 설명한 바와같이 본 고안은 카메라가 정상동작시나 동작하지 않을 경우에 히터에 인가되는 전압을 일정하게 유지시켜 줌으로써 카메라의 셀렉션시 화면의 안정타임이 너무길어지는 것을 방지할 수 있는 효과가 있는 것이다.As described above, the present invention maintains the voltage applied to the heater when the camera is in normal operation or inoperation, thereby preventing the screen from becoming too long when the camera is selected. .

Claims (1)

카메라의 히터전압을 조절하는 회로에 있어서, 정상동작시와 입력전압(VI)과 모니터로부터 인가되는 기준전압을 비교출력하는 연산비교증폭기(OP1)와, 상기 연산비교증폭기(OP1)의 출력단과 카메라 픽업튜브(10)의 히터에 연결되어 히터전압을 조절하기 위한 스위칭 기능의 트랜지스터(TR1)와, 카메라 픽업튜브(10)에 직렬접속되어 입력전압(VI)을 분압하는 저항(R1), (R2)과, 상기 저항(R1), (R2) 및 카메라 픽업튜브(10)에 연결되어 부(-)귀환 방지기능을 갖는 다이오드(D1)로 이루어진 연산증폭기를 이용한 대기전압 발생회로.A circuit for adjusting a heater voltage of a camera, comprising: an operation comparison amplifier OP1 for comparing and outputting an input voltage VI and a reference voltage applied from a monitor during normal operation, an output terminal of the operation comparison amplifier OP1, and a camera Transistor TR1 connected to the heater of the pickup tube 10 to adjust the heater voltage, and resistors R1 and R2 connected in series with the camera pickup tube 10 to divide the input voltage VI. And an operational amplifier comprising a diode (D1) connected to the resistors (R1), (R2) and the camera pickup tube (10) having a negative feedback prevention function.
KR2019880008545U 1988-06-01 1988-06-01 Stand-by voltage generating circuit KR910008619Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019880008545U KR910008619Y1 (en) 1988-06-01 1988-06-01 Stand-by voltage generating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019880008545U KR910008619Y1 (en) 1988-06-01 1988-06-01 Stand-by voltage generating circuit

Publications (2)

Publication Number Publication Date
KR900001967U KR900001967U (en) 1990-01-19
KR910008619Y1 true KR910008619Y1 (en) 1991-10-26

Family

ID=19275960

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019880008545U KR910008619Y1 (en) 1988-06-01 1988-06-01 Stand-by voltage generating circuit

Country Status (1)

Country Link
KR (1) KR910008619Y1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020060924A (en) * 2001-03-26 2002-07-19 임홍우 the food rubber gloves safety a sterilizer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020060924A (en) * 2001-03-26 2002-07-19 임홍우 the food rubber gloves safety a sterilizer

Also Published As

Publication number Publication date
KR900001967U (en) 1990-01-19

Similar Documents

Publication Publication Date Title
GB2285316A (en) Decision circuit operable at a wide range of voltages
KR910008619Y1 (en) Stand-by voltage generating circuit
JPH03181868A (en) Peak detector
JP2953226B2 (en) Reference voltage generation circuit
JPS57155809A (en) Transistor amplifier
JP3043082B2 (en) Operation detection circuit for constant voltage source
KR880001692Y1 (en) Input circuit for agc circuit
JPH0321082Y2 (en)
KR890004258Y1 (en) Automatic control circuit for bias level
JP2900684B2 (en) Constant voltage generator
KR100207553B1 (en) Amplifier having a dc restoration function
KR960003740Y1 (en) Reset circuit
SU1513579A1 (en) Stabilized power source
JPH0448812A (en) Ramp waveform generating circuit
KR910000535Y1 (en) Dc voltage limiting circuit using damp pulse
KR970000427Y1 (en) Circuit for removing the spots on a monitor
KR850002206Y1 (en) Power circuit
KR930003986Y1 (en) Voltage stabilization circuit
JPH0744248A (en) Constant voltage circuit
KR930003748Y1 (en) Switching mode power supply
KR940005338Y1 (en) Clamp circuit for feed-back amplifier
KR100200695B1 (en) Band gap standard voltage generator of semiconductor device
KR910006310Y1 (en) Pop - noise removing circuit
JPS5490549A (en) Dc stabilized power source device
KR930007346Y1 (en) Mode auto-selecting circuit of monitor

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
REGI Registration of establishment
FPAY Annual fee payment

Payment date: 20010928

Year of fee payment: 11

LAPS Lapse due to unpaid annual fee