JPS54159850A - Voltage control crystal oscillator - Google Patents
Voltage control crystal oscillatorInfo
- Publication number
- JPS54159850A JPS54159850A JP6906378A JP6906378A JPS54159850A JP S54159850 A JPS54159850 A JP S54159850A JP 6906378 A JP6906378 A JP 6906378A JP 6906378 A JP6906378 A JP 6906378A JP S54159850 A JPS54159850 A JP S54159850A
- Authority
- JP
- Japan
- Prior art keywords
- output
- value
- counter
- frequency
- counted
- 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
- Oscillators With Electromechanical Resonators (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
PURPOSE: To obtain a voltage control crystal oscillator which is simple-constitution and stable and has a linear output frequency characreristic to the control voltage, by increasing or reducing gradually the counted value of an up/down counter.
CONSTITUTION: In the first counter 2, the frequency of crystal oscillator 1 is counted, and the counted output repeats the change from 0 to n-1. Meanwhile, up/down counter 7 has the same counting capacity as the first counter 2; and assuming that the counted value is K, the value of the parallel output of counter 7 agrees with K once for every f0=f1/n, and at this agreement time, one output pulse is generated at output terminal 9 of agreement circuit 8. In this case, the phase of the output pulse is delayed (advanced) if the value of K is increased (reduced). That is, if the value of K is increased or reduced gradually for every output pulse, the frequency of output pulses is changed. Here, frequency fr proportional to the input control voltage is generated by functional conversion circuit 4 and a V/F converter, and up or down-counting is performed on a basis of the polarity of the input control voltage.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6906378A JPS54159850A (en) | 1978-06-07 | 1978-06-07 | Voltage control crystal oscillator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6906378A JPS54159850A (en) | 1978-06-07 | 1978-06-07 | Voltage control crystal oscillator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54159850A true JPS54159850A (en) | 1979-12-18 |
Family
ID=13391730
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6906378A Pending JPS54159850A (en) | 1978-06-07 | 1978-06-07 | Voltage control crystal oscillator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54159850A (en) |
-
1978
- 1978-06-07 JP JP6906378A patent/JPS54159850A/en active Pending
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