发明名称 |
Multipurpose test equipment input circuitry |
摘要 |
An input terminal adapted to receive 0 to 300 volts AC or DC is connected through AC or DC connecting circuits, coupled into the path by switches, and attenuating apparatus including a plurality of ranges automatically switched into the path in response to the amplitude of an input signal, to a buffer which includes overvoltage protection and provides a relatively high input impedance with a relatively low output or source impedance. A frequency counter is connected through a hysteresis amplifier, a digital volt meter is connected through an amplifier including 60 cycle filtering and an oscilloscope is connected through an independent gain amplifier to the output of the buffer.
|
申请公布号 |
US4382227(A) |
申请公布日期 |
1983.05.03 |
申请号 |
US19800156885 |
申请日期 |
1980.06.05 |
申请人 |
MOTOROLA INC. |
发明人 |
OLIVENBAUM, JAMES E.;BICKLEY, ROBERT H. |
分类号 |
G01R1/20;G01R1/36;G01R15/09;(IPC1-7):G01R15/08 |
主分类号 |
G01R1/20 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|