JPS6461120A - Phase synchronizing oscillator - Google Patents
Phase synchronizing oscillatorInfo
- Publication number
- JPS6461120A JPS6461120A JP62218617A JP21861787A JPS6461120A JP S6461120 A JPS6461120 A JP S6461120A JP 62218617 A JP62218617 A JP 62218617A JP 21861787 A JP21861787 A JP 21861787A JP S6461120 A JPS6461120 A JP S6461120A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- output
- signal
- input signal
- vpc
- 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.)
- Granted
Links
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
PURPOSE:To hold a frequency equal to the frequency of an input signal before the reference input signal has a fault by providing a gate signal generating circuit receiving an output signal of a comparator circuit and an output signal of a fault detection circuit and giving a gate signal to a latch circuit. CONSTITUTION:An output voltage VPC is compared with a control voltage Vc fed to a voltage control oscillating circuit 6 by a voltage comparator circuit 2, a counter circuit 3 starts increment in case of VPC<VC and decrement in case of VPC>=VC. If a fault of an input signal is detected by a fault detection circuit 8, an output logic level of a gate signal generating circuit 9 goes to '1' and a latch circuit 4 stores and holds the parallel digital signal given from the counter circuit 3 at its moment. When the reference input signal is recovered and the output of the counter circuit 3 and the output of the latch circuit 4 are equal to each other, the output level of the gate signal generating circuit 9 is inverted into '0' and the latch circuit 4 gives the output signal of the counter circuit 3 again to a D/A converter circuit 5.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62218617A JPH0656955B2 (en) | 1987-08-31 | 1987-08-31 | Phase-locked oscillator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62218617A JPH0656955B2 (en) | 1987-08-31 | 1987-08-31 | Phase-locked oscillator |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6461120A true JPS6461120A (en) | 1989-03-08 |
JPH0656955B2 JPH0656955B2 (en) | 1994-07-27 |
Family
ID=16722763
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62218617A Expired - Lifetime JPH0656955B2 (en) | 1987-08-31 | 1987-08-31 | Phase-locked oscillator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0656955B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2812453B2 (en) * | 1990-06-29 | 1998-10-22 | アナログ・ディバイセス・インコーポレーテッド | Multi-phase clock signal generation device and its phase detector and restoration device |
-
1987
- 1987-08-31 JP JP62218617A patent/JPH0656955B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2812453B2 (en) * | 1990-06-29 | 1998-10-22 | アナログ・ディバイセス・インコーポレーテッド | Multi-phase clock signal generation device and its phase detector and restoration device |
Also Published As
Publication number | Publication date |
---|---|
JPH0656955B2 (en) | 1994-07-27 |
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