摘要：利用自己的输出，引导高输入电压范围（高达76V ）低压差电压调节器（ MAX6771 ） ，这个电路扩展的CMOS运算放大器（ MAX4162 ）的输入范围，同时保持其高输入阻抗和极低的输入偏置电流（ 1pA的） 。Maxim > App Notes > Amplifier and Comparator Circuits Power-Supply Circuits Keywords: op amps, low-dropout voltage regulators, LDO regulators, CMOS op amps, voltage followers Jan 12, 2011 APPLICATION NOTE 4566 Extending the Input Voltage Range of Standard Op Amps Abstract: Using its own output to bootstrap a low-dropout voltage regulator (MAX6771) with high input-voltage range (up to 76V), this circuit extends the input range of a CMOS op amp (MAX4162) while preserving its high input impedance and very low input bias current ( A similar version of this article appeared in the April 15, 2007 issue of EE Times magazine. Most modern operational amplifiers operate over a 5V (or ±2.5V) or lower voltage range. For applications requiring a larger voltage swing, such……