JPS5577235A - Signal conversion circuit - Google Patents
Signal conversion circuitInfo
- Publication number
- JPS5577235A JPS5577235A JP15161478A JP15161478A JPS5577235A JP S5577235 A JPS5577235 A JP S5577235A JP 15161478 A JP15161478 A JP 15161478A JP 15161478 A JP15161478 A JP 15161478A JP S5577235 A JPS5577235 A JP S5577235A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- alternating
- circuit
- outputted
- current signal
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
- G01R19/1658—AC voltage or recurrent signals
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Logic Circuits (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
PURPOSE:To output a two-level logic signal with a little time delay corresponding to the envelope of an alternating-current signal by converting an intermittent alternating-current signal into a pulse signal by rectifying and then by controlling a time constant by this pulse signal. CONSTITUTION:An alternating-current signal from signal source 2 is applied to full- wave rectifier circuit 3 via contact 1 and this circuit 3 performs the full-wave rectification of the alternating-current signal and then supplies the rectified signal to waveform converter circuit 6. This converter circuit 6 compares signal 3a with preset voltage V1 close to the peak value of signal 3a and when the signal exceeds set voltage V1, pulse signal 6a is outputted. At this time, signal 6a is supplied to integrating circuit 7 and when the integral value exceeds preset voltage value V2, signal 7a of logic ''1'' is outputted. consequently, a two-level logic signal with a little time delay corresponding to the envelope of an intermittent alternating-current signal can be outputted without providing a long-time-constant circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15161478A JPS5577235A (en) | 1978-12-07 | 1978-12-07 | Signal conversion circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15161478A JPS5577235A (en) | 1978-12-07 | 1978-12-07 | Signal conversion circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5577235A true JPS5577235A (en) | 1980-06-10 |
Family
ID=15522377
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15161478A Pending JPS5577235A (en) | 1978-12-07 | 1978-12-07 | Signal conversion circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5577235A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0286282A2 (en) * | 1987-03-27 | 1988-10-12 | Fuji Electrochemical Co.Ltd. | Method for detecting input ac voltage |
JPH01181219A (en) * | 1988-01-12 | 1989-07-19 | Nec Corp | Reception pulse detection circuit |
-
1978
- 1978-12-07 JP JP15161478A patent/JPS5577235A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0286282A2 (en) * | 1987-03-27 | 1988-10-12 | Fuji Electrochemical Co.Ltd. | Method for detecting input ac voltage |
JPH01181219A (en) * | 1988-01-12 | 1989-07-19 | Nec Corp | Reception pulse detection circuit |
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