JPS6467015A - Filter circuit - Google Patents
Filter circuitInfo
- 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
Links
Landscapes
- Networks Using Active Elements (AREA)
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.
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)
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 |
-
1987
- 1987-09-07 JP JP22331687A patent/JPS6467015A/en active Pending
Cited By (4)
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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