JPS5676083A - Oscillating circuit for electronic timepiece - Google Patents
Oscillating circuit for electronic timepieceInfo
- Publication number
- JPS5676083A JPS5676083A JP15375579A JP15375579A JPS5676083A JP S5676083 A JPS5676083 A JP S5676083A JP 15375579 A JP15375579 A JP 15375579A JP 15375579 A JP15375579 A JP 15375579A JP S5676083 A JPS5676083 A JP S5676083A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- frequency
- oscillating
- oscillation
- output
- 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
Abstract
PURPOSE: To improve the precision of an oscillation frequency without increasing a consumption of electric power by a method wherein a high frequency oscillation circuit and a low frequency oscillation circuit are oscillated simutaneously and a low frequency oscillation is changed-over and controlled by means of a phase comparison.
CONSTITUTION: An output of a low frequency oscillation circuit 2 including capacitors 2g, 2h for switching frequencies is divided by means of a frequency divider 4. The phase of a divided frequency signal fa and the phase of an output signal fH from a high frequency oscillating circuit 1 which is integral number times multiplied frequency of the fa frequency signal are compared through a D type FF forming a phase comparison circuit 3. When phases do not coincide with each other, an output of the circuit 3 is inverted and a T type FF8 is controlled through a phase comparison stabilization circuit 7 and further, the opening and the close of Tr 2i, 2j of the circuit 2 are controlled by means of the FF8. With this, capacitors 2g, 2h of the circuit 2 are selected and in accordance with the accuracy of the circuit 1, a low frequency oscillating output is selected and changed-over according to stage by stage. On this account, a circuit 1 wherein consumption of the electric power is great and the precision of an oscillating frequency is high is used for the oscillation switching use by means of a low electric power and low frequency oscillating frequencies are changed-over step by step to generate an oscillating output for the high accurate timepiece use.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15375579A JPS5676083A (en) | 1979-11-28 | 1979-11-28 | Oscillating circuit for electronic timepiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15375579A JPS5676083A (en) | 1979-11-28 | 1979-11-28 | Oscillating circuit for electronic timepiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5676083A true JPS5676083A (en) | 1981-06-23 |
Family
ID=15569408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15375579A Pending JPS5676083A (en) | 1979-11-28 | 1979-11-28 | Oscillating circuit for electronic timepiece |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5676083A (en) |
-
1979
- 1979-11-28 JP JP15375579A patent/JPS5676083A/en active Pending
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