发明名称 |
Integrated instrumentation amplifier for below-ground inputs |
摘要 |
An amplifier having a high input dynamic range as well as high CMRR and PSRR values and input impedance while using a single supply voltage, includes an input stage with two transistors which are biased by a constant current, preferably of less than 1 microampere, while the collectors of the transistors are kept at fixed reference voltages. The input signal applied between the emitters of the transistors is transferred to the terminals of a first resistor which is supplied with current from a circuit which mirrors the current into a second resistor, from the terminals of which the output signal is taken. The preferred application is for forming interfaces for lambda probes fitted to catalytic converters for motor vehicles.
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申请公布号 |
US5276405(A) |
申请公布日期 |
1994.01.04 |
申请号 |
US19920919891 |
申请日期 |
1992.07.27 |
申请人 |
SGS-THOMSON MICROELECTRONICS, S.R.L.;MARELLI SUTRONICA S P A |
发明人 |
MAZZUCCO, MICHELANGLEO;POLETTO, VANNI;MORELLI, MARCO |
分类号 |
G01N27/409;H03F3/45;(IPC1-7):H03F3/45 |
主分类号 |
G01N27/409 |
代理机构 |
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主权项 |
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