JPS6457499A - Sample hold circuit - Google Patents

Sample hold circuit

Info

Publication number
JPS6457499A
JPS6457499A JP62212821A JP21282187A JPS6457499A JP S6457499 A JPS6457499 A JP S6457499A JP 62212821 A JP62212821 A JP 62212821A JP 21282187 A JP21282187 A JP 21282187A JP S6457499 A JPS6457499 A JP S6457499A
Authority
JP
Japan
Prior art keywords
resistance
transistor
input
hold circuit
high speed
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP62212821A
Other languages
Japanese (ja)
Other versions
JP2585285B2 (en
Inventor
Masao Hotta
Shunji Nagata
Toshihiko Shimizu
Yoshito Nene
Kenji Maio
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Image Information Systems Inc
Hitachi Ltd
Original Assignee
Hitachi Ltd
Hitachi Video Engineering Co Ltd
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 Hitachi Ltd, Hitachi Video Engineering Co Ltd filed Critical Hitachi Ltd
Priority to JP62212821A priority Critical patent/JP2585285B2/en
Publication of JPS6457499A publication Critical patent/JPS6457499A/en
Application granted granted Critical
Publication of JP2585285B2 publication Critical patent/JP2585285B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To obtain a high speed sample hold circuit suitable for a bipolar monolithic IC by disposing a means for switching a diode or a diode connected transistor to a reversely biassing mode. CONSTITUTION:In place of a constant current source, a resistance R1 is used and a circuit for continuously making a current passing through the transistor Q2 connected through the diode to the input transistor Q1 equal to an input signal level is added. The current for generating a voltage drop corresponding to an input voltage flows to the resistance R1 connected as a load, a voltage between the base and the emitter of the transistors Q1, Q2 is substantially constant even when a collector current is changed, and the voltage drop of the resistance R1 follows an input to sample the input signal. In such a way, since the load is the resistance, it is not an obstruction for a high speed like a pnp transistor but the high speed sample hold circuit is obtained.
JP62212821A 1987-08-28 1987-08-28 Sample hold circuit Expired - Fee Related JP2585285B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62212821A JP2585285B2 (en) 1987-08-28 1987-08-28 Sample hold circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62212821A JP2585285B2 (en) 1987-08-28 1987-08-28 Sample hold circuit

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP8201530A Division JP2724134B2 (en) 1996-07-31 1996-07-31 Sample and hold circuit

Publications (2)

Publication Number Publication Date
JPS6457499A true JPS6457499A (en) 1989-03-03
JP2585285B2 JP2585285B2 (en) 1997-02-26

Family

ID=16628913

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62212821A Expired - Fee Related JP2585285B2 (en) 1987-08-28 1987-08-28 Sample hold circuit

Country Status (1)

Country Link
JP (1) JP2585285B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6095796A (en) * 1983-10-28 1985-05-29 Hitachi Ltd Sample and hold circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6095796A (en) * 1983-10-28 1985-05-29 Hitachi Ltd Sample and hold circuit

Also Published As

Publication number Publication date
JP2585285B2 (en) 1997-02-26

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees