JPS5636237A - Rf modulator - Google Patents
Rf modulatorInfo
- Publication number
- JPS5636237A JPS5636237A JP11175579A JP11175579A JPS5636237A JP S5636237 A JPS5636237 A JP S5636237A JP 11175579 A JP11175579 A JP 11175579A JP 11175579 A JP11175579 A JP 11175579A JP S5636237 A JPS5636237 A JP S5636237A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- oscillating circuit
- counter
- analogue signal
- surface elastic
- 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
- 230000010355 oscillation Effects 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/20—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a harmonic phase-locked loop, i.e. a loop which can be locked to one of a number of harmonically related frequencies applied to it
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
PURPOSE:To make it possible to select many channels with accurate frequencies, by applying the frequency synthesizer using a surface elastic wave filter to the carrier wave oscillating circuit. CONSTITUTION:The output of carrier wave oscillating circuit 14 passes through surface elastic wave (SAW) filter 15 and is applied to program counter 19 through detecting and amplifying circuit 16 and waveform shaping circuit 17. When contents of counter 19 agree with data from channel selection data input terminal 18, output data of counter 19 is applied to D/A converting circuit 20 and becomes an analogue signal and is applied to oscillating circuit 14. By this analogue signal, the oscillation frequency of oscillating circuit 14 is controlled.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11175579A JPS5636237A (en) | 1979-09-03 | 1979-09-03 | Rf modulator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11175579A JPS5636237A (en) | 1979-09-03 | 1979-09-03 | Rf modulator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5636237A true JPS5636237A (en) | 1981-04-09 |
Family
ID=14569357
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11175579A Pending JPS5636237A (en) | 1979-09-03 | 1979-09-03 | Rf modulator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5636237A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63219596A (en) * | 1987-03-10 | 1988-09-13 | Kosaku:Kk | Tin-lead alloy electroplating method |
-
1979
- 1979-09-03 JP JP11175579A patent/JPS5636237A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63219596A (en) * | 1987-03-10 | 1988-09-13 | Kosaku:Kk | Tin-lead alloy electroplating method |
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