JPS5612122A - Pcm signal demodulating circuit - Google Patents
Pcm signal demodulating circuitInfo
- Publication number
- JPS5612122A JPS5612122A JP8863279A JP8863279A JPS5612122A JP S5612122 A JPS5612122 A JP S5612122A JP 8863279 A JP8863279 A JP 8863279A JP 8863279 A JP8863279 A JP 8863279A JP S5612122 A JPS5612122 A JP S5612122A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- output
- synchronizing
- pulses
- counter
- 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
- 238000005070 sampling Methods 0.000 abstract 4
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/66—Digital/analogue converters
- H03M1/82—Digital/analogue converters with intermediate conversion to time interval
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE:To attain accurate demodulation of PCM signals by providing the D/A converter of a PCM demodulating circuit with a sawtooth wave generating circuit that rises synchronizing with sampling pulses. CONSTITUTION:To input terminal 10, a PCM signal of sampling time T consisting of sampling pulse P and the following data signal D is input and pulses P are detected by sampling pulse detecting circuit 11; and the data signal is converted, synchronizing with pulses P, by series-parallel converting circuit 12 into a parallel signal, which is stored in register 13. The output of clock generating circuit 14, on the other hand, is counted by counter 15 synchronizing with pulses P and a sawtooth wave is generated by circuit 16 synchronizing with the output of counter 15. When the digital value of register 13 coincides with the output value of counter 15, coincidence circuit 17 generates an output, which is applied to sample holding circuit 18 and the output voltage of circuit 16 at that point in time is sampled and held, so that an analog voltage that corresponds to the digital input signal can be obtained from output terminal 19.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8863279A JPS5612122A (en) | 1979-07-11 | 1979-07-11 | Pcm signal demodulating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8863279A JPS5612122A (en) | 1979-07-11 | 1979-07-11 | Pcm signal demodulating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5612122A true JPS5612122A (en) | 1981-02-06 |
Family
ID=13948174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8863279A Pending JPS5612122A (en) | 1979-07-11 | 1979-07-11 | Pcm signal demodulating circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5612122A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58168327A (en) * | 1982-03-29 | 1983-10-04 | Toshiba Corp | Pulse width modulating circuit |
| JPS59224917A (en) * | 1983-06-03 | 1984-12-17 | Hitachi Ltd | Digital to analog converter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5351953A (en) * | 1976-09-01 | 1978-05-11 | Motorola Inc | Da converter |
-
1979
- 1979-07-11 JP JP8863279A patent/JPS5612122A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5351953A (en) * | 1976-09-01 | 1978-05-11 | Motorola Inc | Da converter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58168327A (en) * | 1982-03-29 | 1983-10-04 | Toshiba Corp | Pulse width modulating circuit |
| JPS59224917A (en) * | 1983-06-03 | 1984-12-17 | Hitachi Ltd | Digital to analog converter |
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