JPS55116272A - Voltage detector - Google Patents
Voltage detectorInfo
- Publication number
- JPS55116272A JPS55116272A JP2428079A JP2428079A JPS55116272A JP S55116272 A JPS55116272 A JP S55116272A JP 2428079 A JP2428079 A JP 2428079A JP 2428079 A JP2428079 A JP 2428079A JP S55116272 A JPS55116272 A JP S55116272A
- Authority
- JP
- Japan
- Prior art keywords
- level
- input
- signal
- 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
Abstract
PURPOSE: To eliminate the influence of noise, etc. by the method wherein, when the power supply voltage is below a specified value, a voltage detector circuit which prohibits the operation of a circuit connected to the power supply is formed so that the detector output has hysteresis characteristic.
CONSTITUTION: TTL circuit 42 outputs a level signal opposite to the signal level to the signal level to be impressed to input IN when input OE is at a high level, and makes its output a high impedance regardless of the level of IN when input OE is at a low level. Voltage detector circuit 41 connected here constrols multi-emitter type transistor Q43 as variation in the voltage at node N has hysteresis characteristic with respect to the variation in power supply voltage VCC. Consequently, after VCC rises and reaches a specified value, even if VCC drops due to the influence of noise, etc., TTL circuit 42 outputs a correct signal corresponding to the input signal, so that a stable operation can be performed.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2428079A JPS55116272A (en) | 1979-03-02 | 1979-03-02 | Voltage detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2428079A JPS55116272A (en) | 1979-03-02 | 1979-03-02 | Voltage detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55116272A true JPS55116272A (en) | 1980-09-06 |
Family
ID=12133772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2428079A Pending JPS55116272A (en) | 1979-03-02 | 1979-03-02 | Voltage detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55116272A (en) |
-
1979
- 1979-03-02 JP JP2428079A patent/JPS55116272A/en active Pending
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