JPS5573108A - Fm signal demodulator - Google Patents
Fm signal demodulatorInfo
- Publication number
- JPS5573108A JPS5573108A JP14662378A JP14662378A JPS5573108A JP S5573108 A JPS5573108 A JP S5573108A JP 14662378 A JP14662378 A JP 14662378A JP 14662378 A JP14662378 A JP 14662378A JP S5573108 A JPS5573108 A JP S5573108A
- Authority
- JP
- Japan
- Prior art keywords
- output
- oscillator
- delivered
- counter
- led
- 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
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
Abstract
PURPOSE: To enhance the temperature characteristics by measuring the length of one cycle of the input FM signal through counting of the clocks supplied from the high- speed oscillator and then reading the output signals from the memory which memorized them previously and in accordance with the number of the clocks.
CONSTITUTION: The digital signals sent from the limiter at the control signal demodulation part of the lincompex communication equipment are supplied to counter 31. Then the mean value is delivered to be led to detection circuit 32, and single pulse 302 is delivered to be supplied to latch 35. At the same time, counter 34 is cleared via pulse 303 which is rather delayed. Then high-speed oscillator 33 is connected to counter 34 to transfer the number of the high-speed clocks equivalent to one cycle of latch 35. The output of latck 35 is led to the address of ROM35, and the output value corresponding to the input frequency value memorized previously is delivered to be then led to D/A converter 37 for output of the analog signals. Oscillator 33 is a fixed oscillator comprising the memory and the digital circuit, thus obtaining easily an FM demodulator circuit which excels in the temperature characteristics and the reliability.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14662378A JPS5573108A (en) | 1978-11-29 | 1978-11-29 | Fm signal demodulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14662378A JPS5573108A (en) | 1978-11-29 | 1978-11-29 | Fm signal demodulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5573108A true JPS5573108A (en) | 1980-06-02 |
Family
ID=15411914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14662378A Pending JPS5573108A (en) | 1978-11-29 | 1978-11-29 | Fm signal demodulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5573108A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62163405A (en) * | 1986-01-13 | 1987-07-20 | Ayao Miura | Demodulator of frequency modulation wave |
-
1978
- 1978-11-29 JP JP14662378A patent/JPS5573108A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62163405A (en) * | 1986-01-13 | 1987-07-20 | Ayao Miura | Demodulator of frequency modulation wave |
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