JPS573438A - Synthesizer type channel selector - Google Patents
Synthesizer type channel selectorInfo
- Publication number
- JPS573438A JPS573438A JP7622180A JP7622180A JPS573438A JP S573438 A JPS573438 A JP S573438A JP 7622180 A JP7622180 A JP 7622180A JP 7622180 A JP7622180 A JP 7622180A JP S573438 A JPS573438 A JP S573438A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- output
- loop
- tuner
- oscillator
- 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
- 239000000470 constituent Substances 0.000 abstract 3
- 230000001360 synchronised effect Effects 0.000 abstract 3
- 230000010354 integration Effects 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
- H03L7/22—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using more than one loop
- H03L7/23—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using more than one loop with pulse counters or frequency dividers
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Superheterodyne Receivers (AREA)
Abstract
PURPOSE:To make possible the fine tuning of a tuner with a simple constitution, by constituting two phase synchronized loops consisting of constituent elements, and obtaining the reference frequency of the other loop based on the oscillated output obtained from one loop. CONSTITUTION:An output from a reference oscillator 18 of the 2nd phase synchronized loop is changed to a required component via each constituent and applied to a voltage-controlled variable oscillator 14 of the same loop. Next a frequency divider 13 of the 1st phase synchronized loop frequency-divides the output from the oscillator 14 to output a reference frequency fr 1. The phase difference between the output of a frequency divider 10 frequency-dividing a local oscillating frequency fl of an electronic tuner 8 and the frequency fr 1 is outputted at a phase comparator 11. Next, this output is inputted to a low-pass filter 12 to make output as a tuning voltage at the tuner 8 through integration. Thus, fine tuning can be made without changing the fr 1 by changing the number of counts of the frequency divider 10 and determining the number of counts of the frequency dividers of each constituent element so that the step between stations can be changed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7622180A JPS573438A (en) | 1980-06-06 | 1980-06-06 | Synthesizer type channel selector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7622180A JPS573438A (en) | 1980-06-06 | 1980-06-06 | Synthesizer type channel selector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS573438A true JPS573438A (en) | 1982-01-08 |
Family
ID=13599118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7622180A Pending JPS573438A (en) | 1980-06-06 | 1980-06-06 | Synthesizer type channel selector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS573438A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995006359A1 (en) * | 1993-08-27 | 1995-03-02 | H.U.C. Elektronik Gmbh | Pll system |
-
1980
- 1980-06-06 JP JP7622180A patent/JPS573438A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995006359A1 (en) * | 1993-08-27 | 1995-03-02 | H.U.C. Elektronik Gmbh | Pll system |
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