JPS5540974A - Signal detection circuit - Google Patents

Signal detection circuit

Info

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
Application number
JP11443478A
Other languages
Japanese (ja)
Inventor
Yasuo Taguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP11443478A priority Critical patent/JPS5540974A/en
Publication of JPS5540974A publication Critical patent/JPS5540974A/en
Pending legal-status Critical Current

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
JP11443478A 1978-09-18 1978-09-18 Signal detection circuit Pending JPS5540974A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS639230A (en) * 1986-06-30 1988-01-14 Fujitsu Ltd Digital analog converter circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS639230A (en) * 1986-06-30 1988-01-14 Fujitsu Ltd Digital analog converter circuit

Similar Documents

Publication Publication Date Title
JPS5540974A (en) Signal detection circuit
JPS54154365A (en) Power supply voltage detecting circuit
JPS5448470A (en) A/d conversion circuit
JPS55621A (en) Delay circuit
JPS5462764A (en) Monostable multivibrator circuit
JPS551712A (en) Electronic switch circuit
JPS552915A (en) Device to detect number of revolution
JPS5493951A (en) Frequency digital variable pulse generator
JPS5327353A (en) Bipolar digital-analog converter
JPS5646334A (en) Timer device
JPS5383599A (en) Display circuit
JPS5487280A (en) Analog input circuit
JPS5322347A (en) Analogue memory circuit
JPS5571319A (en) Comparator circuit system
JPS5780826A (en) Waveform shaping circuit
JPS55149873A (en) Overcurrent detector
JPS5228361A (en) Physical quantity detecting circuit
JPS54158898A (en) Liquid-crystal display unit with solar battery
JPS54101374A (en) Peak value detecting circuit of analog signals
JPS57165748A (en) Detection circuit of quantity of toner
JPS5537886A (en) Gate pulse generator
JPS5684030A (en) Peak detecting circuit
JPS5323669A (en) Small electronic device
JPS57106901A (en) Digital controller for vehicle
JPS5346240A (en) Signal transmission circuit