JPS55116275A - Automatic frequency discriminating circuit for commercial power supply - Google Patents
Automatic frequency discriminating circuit for commercial power supplyInfo
- Publication number
- JPS55116275A JPS55116275A JP2472779A JP2472779A JPS55116275A JP S55116275 A JPS55116275 A JP S55116275A JP 2472779 A JP2472779 A JP 2472779A JP 2472779 A JP2472779 A JP 2472779A JP S55116275 A JPS55116275 A JP S55116275A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- power supply
- output
- commercial power
- pulse generator
- 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
- Stand-By Power Supply Arrangements (AREA)
Abstract
PURPOSE: To discriminate a commercial power supply frequency automatically by comparing and discriminating the outputs of a frequency pulse generator circuit corresponding to a power supply period and a comparison pulse generator circuit selected in connection with a different power supply frequency.
CONSTITUTION: Commercial power of 50Hz or 60Hz is supplied to binary circuit 4. A pulse is generated from differential circuit 5 at the rise time of the output and from differential circuit 10 at the fall time. This is connected to clock pulse generator 1, and a train of pulses corresponding to the power supply period is formed. By the output of differential circuit 5, frequency divider circuit 2 starts counting, comparison pulses are formed and are compared with the output of differential circuit 10 in discriminator circuit 11, and an output is obtained in detector circuit 9 via 50-Hz counter 7 and 60-Hz counter 12. Consequently, output i and output l become 1 respectively at 50Hz and 60Hz, so that it is possible to switch those circuits automatically by this value when their switching is required.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2472779A JPS55116275A (en) | 1979-03-02 | 1979-03-02 | Automatic frequency discriminating circuit for commercial power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2472779A JPS55116275A (en) | 1979-03-02 | 1979-03-02 | Automatic frequency discriminating circuit for commercial power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55116275A true JPS55116275A (en) | 1980-09-06 |
Family
ID=12146178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2472779A Pending JPS55116275A (en) | 1979-03-02 | 1979-03-02 | Automatic frequency discriminating circuit for commercial power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55116275A (en) |
-
1979
- 1979-03-02 JP JP2472779A patent/JPS55116275A/en active Pending
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