JPS6467015A - Filter circuit - Google Patents

Filter circuit

Info

Publication number
JPS6467015A
JPS6467015A JP22331687A JP22331687A JPS6467015A JP S6467015 A JPS6467015 A JP S6467015A JP 22331687 A JP22331687 A JP 22331687A JP 22331687 A JP22331687 A JP 22331687A JP S6467015 A JPS6467015 A JP S6467015A
Authority
JP
Japan
Prior art keywords
level
voltage division
base
voltage
circuit
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
JP22331687A
Other languages
Japanese (ja)
Inventor
Kouun Kouno
Tadashi Terada
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP22331687A priority Critical patent/JPS6467015A/en
Publication of JPS6467015A publication Critical patent/JPS6467015A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To reduce the number of components by setting bases of 2nd and 3rd transistors(TRs) to the same level as the base of a 1st TR in tems of DC. CONSTITUTION:The structure of a voltage division circuit 33 to divide an output signal to supply a voltage division signal to one input section of a 2nd Gm amplifier 32 is far simplified in comparison with a conventional circuit. That is, in applying a DC power voltage VB3 to make the level of the base of the TR Q43 equal to the DC level of the base of the TR Q45, the DC voltage level of TRs Q38, Q39 is kept equal. Thus, resistors R14, R15 are operated for voltage division and simultaneously are used as elements to constitute the input circuit of the Gm amplifier and the number of elements to be added for voltage division is very less.
JP22331687A 1987-09-07 1987-09-07 Filter circuit Pending JPS6467015A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22331687A JPS6467015A (en) 1987-09-07 1987-09-07 Filter circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22331687A JPS6467015A (en) 1987-09-07 1987-09-07 Filter circuit

Publications (1)

Publication Number Publication Date
JPS6467015A true JPS6467015A (en) 1989-03-13

Family

ID=16796242

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22331687A Pending JPS6467015A (en) 1987-09-07 1987-09-07 Filter circuit

Country Status (1)

Country Link
JP (1) JPS6467015A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0435518A (en) * 1990-05-31 1992-02-06 Sanyo Electric Co Ltd Filter circuit
EP0696104A1 (en) 1994-08-01 1996-02-07 Kabushiki Kaisha Toshiba Active bandpass filter
US5574398A (en) * 1994-08-01 1996-11-12 Kabushiki Kaisha Toshiba Active bandpass filter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0435518A (en) * 1990-05-31 1992-02-06 Sanyo Electric Co Ltd Filter circuit
EP0696104A1 (en) 1994-08-01 1996-02-07 Kabushiki Kaisha Toshiba Active bandpass filter
US5561394A (en) * 1994-08-01 1996-10-01 Kabushiki Kaisha Toshiba Active bandpass filter
US5574398A (en) * 1994-08-01 1996-11-12 Kabushiki Kaisha Toshiba Active bandpass filter

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