一种高增益高电流效率的运算跨导放大器
A high-gain high-current-efficiency OTA
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摘要: 为了提高增益自举OTA的电流效率，对主运放、辅助运放及其共模反馈电路进行了电流复用，在华宏0.35 μm工艺5 V电源电压下实现了一种具有大DC增益(大于121 dB)、高电流效率(大于1 146 MHz*pF/mA)、宽差分输出动态范围(大于9 V)的OTA结构.Abstract: In order to enhance the current efficiency of gain-boosting OTA, the current recycling technique has been used in main OTA, auxiliary OTA and its common-mode feedback circuit. Implemented in 5 V HHGrace 0.35 μm CMOS process, simulated results show that the improved OTA possesses high DC gain (> 121 dB), high current efficiency (> 1 146 MHz*pF/mA) and wide differential output dynamic range (> 9 V).
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