JPS6467012A - Pulse count system fm demodulation circuit - Google Patents
Pulse count system fm demodulation circuitInfo
- Publication number
- JPS6467012A JPS6467012A JP22331587A JP22331587A JPS6467012A JP S6467012 A JPS6467012 A JP S6467012A JP 22331587 A JP22331587 A JP 22331587A JP 22331587 A JP22331587 A JP 22331587A JP S6467012 A JPS6467012 A JP S6467012A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- count
- state
- demodulation circuit
- pulse count
- 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
- Television Signal Processing For Recording (AREA)
Abstract
PURPOSE:To improve the linearity of a demodulation output by constituting the titled circuit such that no undesired charge is stored in a capacitor for count so as to make the count operation of the capacitor accurate. CONSTITUTION:Constant current source 51, 61, 62 are connected respectively to each of the circuits of two differential transistor(TR) sets so as to avoid the storage of undesired charge in the count capacitor 52 when the state is transited from the on-state of one TR of one set among two sets of differential pair TRs connected in parallel to extract the output into the on-state of the other TR of the other set. Thus, the count time of the capacitor 52 affected by the frequency of an input signal is prevented and the FM demodulation output with good linearity is obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22331587A JPS6467012A (en) | 1987-09-07 | 1987-09-07 | Pulse count system fm demodulation circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22331587A JPS6467012A (en) | 1987-09-07 | 1987-09-07 | Pulse count system fm demodulation circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6467012A true JPS6467012A (en) | 1989-03-13 |
Family
ID=16796225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22331587A Pending JPS6467012A (en) | 1987-09-07 | 1987-09-07 | Pulse count system fm demodulation circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6467012A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993017491A1 (en) * | 1989-10-06 | 1993-09-02 | Hiroya Itoh | Fm demodulation circuit |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5738007A (en) * | 1980-08-19 | 1982-03-02 | Matsushita Electric Ind Co Ltd | Fm demodulator |
JPS6171707A (en) * | 1984-09-14 | 1986-04-12 | Toshiba Corp | Fm demodulation circuit |
JPS61145905A (en) * | 1984-12-19 | 1986-07-03 | Rohm Co Ltd | Fm demodulation circuit |
-
1987
- 1987-09-07 JP JP22331587A patent/JPS6467012A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5738007A (en) * | 1980-08-19 | 1982-03-02 | Matsushita Electric Ind Co Ltd | Fm demodulator |
JPS6171707A (en) * | 1984-09-14 | 1986-04-12 | Toshiba Corp | Fm demodulation circuit |
JPS61145905A (en) * | 1984-12-19 | 1986-07-03 | Rohm Co Ltd | Fm demodulation circuit |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993017491A1 (en) * | 1989-10-06 | 1993-09-02 | Hiroya Itoh | Fm demodulation circuit |
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