JPS6412610A - Semiconductor integrated circuit - Google Patents

Semiconductor integrated circuit

Info

Publication number
JPS6412610A
JPS6412610A JP16832487A JP16832487A JPS6412610A JP S6412610 A JPS6412610 A JP S6412610A JP 16832487 A JP16832487 A JP 16832487A JP 16832487 A JP16832487 A JP 16832487A JP S6412610 A JPS6412610 A JP S6412610A
Authority
JP
Japan
Prior art keywords
components
base
twin
base potential
control
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.)
Pending
Application number
JP16832487A
Other languages
Japanese (ja)
Inventor
Satoshi Tanaka
Tomoyuki Watabe
Yutaka Okada
Minoru Nagata
Shizuo Kondo
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 Ltd
Original Assignee
Hitachi 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 filed Critical Hitachi Ltd
Priority to JP16832487A priority Critical patent/JPS6412610A/en
Publication of JPS6412610A publication Critical patent/JPS6412610A/en
Pending legal-status Critical Current

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  • Semiconductor Integrated Circuits (AREA)
  • Networks Using Active Elements (AREA)

Abstract

PURPOSE:To form an ideal twin-T filter on a monolithic IC even with a large parasitic element by using a means controlling independently plural circuit components so as to vary independently >=2 passive components among the plural circuit components. CONSTITUTION:The twin-T filter section consists of three capacitive components QC1-QC3 and three resistive components R1-R3, a transistor (TR) Q1 constitutes an input emitter follower and two TRs Q2, Q3 constitute a feedback amplifier. When a base potential VE of the TR Q3 is changed to control the current flowing therethrough, thereby varying a base potential of a TR Q4 and varying a bias applied to the base-emitter capacitance of each capacitive component. A base potential VR of a TR Q5 is varied to control the pinch resistor R3 and the base potential Vc of the TR Q6 is controlled to control the collector-base capacitance of the capacitive component QC3. Thus, the ideal twin-T filter is formed on the monolithic IC even with the parasitic element added thereto.
JP16832487A 1987-07-06 1987-07-06 Semiconductor integrated circuit Pending JPS6412610A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16832487A JPS6412610A (en) 1987-07-06 1987-07-06 Semiconductor integrated circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16832487A JPS6412610A (en) 1987-07-06 1987-07-06 Semiconductor integrated circuit

Publications (1)

Publication Number Publication Date
JPS6412610A true JPS6412610A (en) 1989-01-17

Family

ID=15865928

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16832487A Pending JPS6412610A (en) 1987-07-06 1987-07-06 Semiconductor integrated circuit

Country Status (1)

Country Link
JP (1) JPS6412610A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6588256B2 (en) 2000-08-04 2003-07-08 Siemens Aktiengesellschaft Method and device for determining torque setpoint values for a motor vehicle having at least two drive assemblies

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5342427A (en) * 1976-09-30 1978-04-17 Boeicho Gijutsu Kenkyu Honbuch Emergency erected bridge
JPS5673918A (en) * 1979-11-20 1981-06-19 Fujitsu Ltd Active filter of twin t type
JPS60136408A (en) * 1983-12-26 1985-07-19 Matsushita Electric Ind Co Ltd High frequency signal switching device
JPS60229415A (en) * 1984-04-27 1985-11-14 Hitachi Ltd Filter integrated circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5342427A (en) * 1976-09-30 1978-04-17 Boeicho Gijutsu Kenkyu Honbuch Emergency erected bridge
JPS5673918A (en) * 1979-11-20 1981-06-19 Fujitsu Ltd Active filter of twin t type
JPS60136408A (en) * 1983-12-26 1985-07-19 Matsushita Electric Ind Co Ltd High frequency signal switching device
JPS60229415A (en) * 1984-04-27 1985-11-14 Hitachi Ltd Filter integrated circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6588256B2 (en) 2000-08-04 2003-07-08 Siemens Aktiengesellschaft Method and device for determining torque setpoint values for a motor vehicle having at least two drive assemblies

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