发明名称 |
Micropower DC voltage indicator |
摘要 |
A micropower DC voltage indicator is provided that is a two terminal device with a very high input impedance. An oscillator circuit is provided by a series of inverters, such as metal-oxide semiconductors (MOS) with the power inputs connected in parallel. A suitable RC circuit connects the output of one MOS inverter to the input of another MOS inverter, otherwise the output of each MOS inverter connects directly to the input of the next MOS inverter. Across one of the MOS inverters is connected a liquid crystal display which indicates if a DC voltage within a specific range is applied to the two terminals of the DC voltage indicator. The two terminal inputs to the oscillator circuit have a very high impedance and operate over a fairly broad DC voltage range.
|
申请公布号 |
US4614940(A) |
申请公布日期 |
1986.09.30 |
申请号 |
US19850790613 |
申请日期 |
1985.10.21 |
申请人 |
SOUTHWEST RESEARCH INSTITUTE |
发明人 |
JAECKLE, THOMAS H. |
分类号 |
G01R19/165;G01R19/155;G08B21/20;(IPC1-7):G08B21/00;G09G3/18;H03B5/12 |
主分类号 |
G01R19/165 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|