JPS6447269A - Power-on-reset circuit - Google Patents

Power-on-reset circuit

Info

Publication number
JPS6447269A
JPS6447269A JP20283287A JP20283287A JPS6447269A JP S6447269 A JPS6447269 A JP S6447269A JP 20283287 A JP20283287 A JP 20283287A JP 20283287 A JP20283287 A JP 20283287A JP S6447269 A JPS6447269 A JP S6447269A
Authority
JP
Japan
Prior art keywords
circuit
signal
converter
power
por
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
Application number
JP20283287A
Other languages
Japanese (ja)
Other versions
JPH0574306B2 (en
Inventor
Hiroki Shimamura
Jun Terada
Fujio Amamiya
Naofumi Nagai
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.)
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Oki Electric Industry 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 Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP20283287A priority Critical patent/JPS6447269A/en
Publication of JPS6447269A publication Critical patent/JPS6447269A/en
Publication of JPH0574306B2 publication Critical patent/JPH0574306B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Dc-Dc Converters (AREA)

Abstract

PURPOSE:To increase the degree of accuracy of a reset time by providing a DC-DC converter and a rectifier circuit producing the comparison voltage and a clock signal to become the output of a voltage detection circuit through a self-excited oscillation signal of the converter. CONSTITUTION:A power-on-reset(POR) circuit is constituted of a POR signal oscillation circuit 50 consisting of a DC-DC converter 10, a rectifier circuit 20, a voltage detection circuit 30 and a counter 40. The converter 10 is a constant-voltage type and connected to the above-mentioned POR signal oscillation circuit 50. And, when the input power voltage is applied between input terminals, a self-excited oscillation signal Vf is transmitted to the rectifier circuit 20, and the power is supplied to the above-mentioned oscillation circuit 50. And, a reset state of the counter 40 is released by the rectifier circuit 20 and the voltage detection circuit 30, and when the reset state of the counter 40 is released, a clock signal is counted, then when it achieves a specific value, the POR signal is outputted.
JP20283287A 1987-08-14 1987-08-14 Power-on-reset circuit Granted JPS6447269A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20283287A JPS6447269A (en) 1987-08-14 1987-08-14 Power-on-reset circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20283287A JPS6447269A (en) 1987-08-14 1987-08-14 Power-on-reset circuit

Publications (2)

Publication Number Publication Date
JPS6447269A true JPS6447269A (en) 1989-02-21
JPH0574306B2 JPH0574306B2 (en) 1993-10-18

Family

ID=16463930

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20283287A Granted JPS6447269A (en) 1987-08-14 1987-08-14 Power-on-reset circuit

Country Status (1)

Country Link
JP (1) JPS6447269A (en)

Also Published As

Publication number Publication date
JPH0574306B2 (en) 1993-10-18

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