JPS6467011A - Pulse count system fm demodulation circuit - Google Patents
Pulse count system fm demodulation circuitInfo
- Publication number
- JPS6467011A JPS6467011A JP22331487A JP22331487A JPS6467011A JP S6467011 A JPS6467011 A JP S6467011A JP 22331487 A JP22331487 A JP 22331487A JP 22331487 A JP22331487 A JP 22331487A JP S6467011 A JPS6467011 A JP S6467011A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- count
- current mirror
- output
- circuits
- 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
Abstract
PURPOSE:To obtain a demodulation output with excellent linearity by adding a current mirror circuit to a conventional circuit so as to make always the count time of a capacitor constant independently of the input frequency. CONSTITUTION:In extracting output from 3rd and 4th pairs of differential transistor(TR) circuits 5, 6; 7, 8, they is extracted via current mirror circuits CUR 1, 2. Moreover, the collector current of one set of output TRs is fed back to the emitter of the other set of drive TR via the current mirror circuits CUR1, 2 so as to avoid the storage of the undesired charge in the capacitor 23 thereby preventing the production of the voltage DELTAVo giving effect on the count time of the capacitor 23. Thus, no undesired charge is stored in the count capacitor 23 and the count by the capacitor is made accurate, then the linearity of demodulation output is improved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22331487A JPS6467011A (en) | 1987-09-07 | 1987-09-07 | Pulse count system fm demodulation circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22331487A JPS6467011A (en) | 1987-09-07 | 1987-09-07 | Pulse count system fm demodulation circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6467011A true JPS6467011A (en) | 1989-03-13 |
Family
ID=16796210
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22331487A Pending JPS6467011A (en) | 1987-09-07 | 1987-09-07 | Pulse count system fm demodulation circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6467011A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6460244B1 (en) | 1995-07-18 | 2002-10-08 | Vishay Dale Electronics, Inc. | Method for making a high current, low profile inductor |
-
1987
- 1987-09-07 JP JP22331487A patent/JPS6467011A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6460244B1 (en) | 1995-07-18 | 2002-10-08 | Vishay Dale Electronics, Inc. | Method for making a high current, low profile inductor |
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