JPS5540974A - Signal detection circuit - Google Patents
Signal detection circuitInfo
- Publication number
- JPS5540974A JPS5540974A JP11443478A JP11443478A JPS5540974A JP S5540974 A JPS5540974 A JP S5540974A JP 11443478 A JP11443478 A JP 11443478A JP 11443478 A JP11443478 A JP 11443478A JP S5540974 A JPS5540974 A JP S5540974A
- Authority
- JP
- Japan
- Prior art keywords
- comparator
- detection level
- voltage
- detection circuit
- power supply
- 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
- Measurement Of Current Or Voltage (AREA)
Abstract
PURPOSE: To enable to detect signal accurately, by changing the detected potential of input signal depending on the power supply voltage.
CONSTITUTION: The input signal detection level of the comparator 26 determined with the resistors 27 and 28 of the detection circuit 21 is set higher so that the damping waveform of the imput signal S can not be detected. This damping waveform is changed depending on the voltage of the power supply 9 and the detection level of the comparator is changed depending on the power supply voltage. Further, if the charged up voltage of the capacitor 22 is once in excess of the ON detection level of the comparator 36, unless the capacitor charge up voltage is less than the OFF detection level of the comparator 36 sufficiently lower than the ON detection level, hysteresis characteristics are given to the detection circuit 23 with the transistor 42 so that the comparator output is not inverted.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11443478A JPS5540974A (en) | 1978-09-18 | 1978-09-18 | Signal detection circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11443478A JPS5540974A (en) | 1978-09-18 | 1978-09-18 | Signal detection circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5540974A true JPS5540974A (en) | 1980-03-22 |
Family
ID=14637617
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11443478A Pending JPS5540974A (en) | 1978-09-18 | 1978-09-18 | Signal detection circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5540974A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS639230A (en) * | 1986-06-30 | 1988-01-14 | Fujitsu Ltd | Digital analog converter circuit |
-
1978
- 1978-09-18 JP JP11443478A patent/JPS5540974A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS639230A (en) * | 1986-06-30 | 1988-01-14 | Fujitsu Ltd | Digital analog converter circuit |
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