JPS54159210A - Emphasis circuit of fm modulator and demodulator - Google Patents
Emphasis circuit of fm modulator and demodulatorInfo
- Publication number
- JPS54159210A JPS54159210A JP6854478A JP6854478A JPS54159210A JP S54159210 A JPS54159210 A JP S54159210A JP 6854478 A JP6854478 A JP 6854478A JP 6854478 A JP6854478 A JP 6854478A JP S54159210 A JPS54159210 A JP S54159210A
- Authority
- JP
- Japan
- Prior art keywords
- resistance
- line
- high frequency
- circuit
- emphasis 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
- Television Signal Processing For Recording (AREA)
Abstract
PURPOSE: To perform emphasis of good phase characteristics by generating preshoot and overshoot through the use of a high frequency emphasis circuit.
CONSTITUTION: Waveform delayed by τ time is generated across the matching resistance 4-5 of line 4-5 through the collector of the transistor 4-2 of a high frequency emphasis circuit free from phase distortions provided with the delay line 4-5 and the line 4-5 by the application of video pulse signal. On the other hand, the signal having been amplified by a transistor 4-4 through a resistance 4-3 reflects at the line 4-5 from the resistance 4-6 and the waveform delayed by 2τ time is also generated in the resistance 4-6. These waveforms are combined and preshoot and overshoot are symmertically applied to become the emphasized waveform of flat and good phase characteristics, which is then applied to an FM modulating circuit. The deemphasis after the FM demodulation is also well accomplished in a similar manner in a high frequency reduction circuit.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6854478A JPS54159210A (en) | 1978-06-06 | 1978-06-06 | Emphasis circuit of fm modulator and demodulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6854478A JPS54159210A (en) | 1978-06-06 | 1978-06-06 | Emphasis circuit of fm modulator and demodulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54159210A true JPS54159210A (en) | 1979-12-15 |
Family
ID=13376796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6854478A Pending JPS54159210A (en) | 1978-06-06 | 1978-06-06 | Emphasis circuit of fm modulator and demodulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54159210A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58121878A (en) * | 1981-10-14 | 1983-07-20 | テレフンケン・フエルンゼ−・ウント・ルントフンク・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | Circuit for sharpening side edge of video signal |
| JPH02241287A (en) * | 1989-03-15 | 1990-09-25 | Matsushita Electric Ind Co Ltd | Pulse edge extension circuit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5331117A (en) * | 1976-09-03 | 1978-03-24 | Hitachi Ltd | Magnetic reproducer |
| JPS53131815A (en) * | 1977-04-22 | 1978-11-17 | Hitachi Ltd | Phase linear type emphasizer |
-
1978
- 1978-06-06 JP JP6854478A patent/JPS54159210A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5331117A (en) * | 1976-09-03 | 1978-03-24 | Hitachi Ltd | Magnetic reproducer |
| JPS53131815A (en) * | 1977-04-22 | 1978-11-17 | Hitachi Ltd | Phase linear type emphasizer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58121878A (en) * | 1981-10-14 | 1983-07-20 | テレフンケン・フエルンゼ−・ウント・ルントフンク・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | Circuit for sharpening side edge of video signal |
| JPH0134503B2 (en) * | 1981-10-14 | 1989-07-19 | Terefunken Fuerunzee Unto Runtofunku Gmbh | |
| JPH02241287A (en) * | 1989-03-15 | 1990-09-25 | Matsushita Electric Ind Co Ltd | Pulse edge extension circuit |
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