JPS6447269A - Power-on-reset circuit - Google Patents
Power-on-reset circuitInfo
- 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
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.
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) |
-
1987
- 1987-08-14 JP JP20283287A patent/JPS6447269A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH0574306B2 (en) | 1993-10-18 |
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