Pisenti N C, Restelli A, Reschovsky B J, Barker D S, Campbell G K
Joint Quantum Institute, University of Maryland and National Institute of Standards and Technology, College Park, Maryland 20742, USA.
Rev Sci Instrum. 2016 Dec;87(12):124702. doi: 10.1063/1.4969059.
We present an ultra-low noise, high-voltage driver suited for use with piezoelectric actuators and other low-current applications. The architecture uses a flyback switching regulator to generate up to 250 V in our current design, with an output of 1 kV or more possible with small modifications. A high slew-rate op-amp suppresses the residual switching noise, yielding a total root-mean-square noise of ≈100 μV (1 Hz-100 kHz). A low-voltage (±10 V), high bandwidth signal can be summed with unity gain directly onto the output, making the driver well-suited for closed-loop feedback applications. Digital control enables both repeatable setpoints and sophisticated control logic, and the circuit consumes less than 150 mA at ±15 V.
我们展示了一种适用于压电致动器和其他低电流应用的超低噪声、高压驱动器。在我们当前的设计中，该架构使用反激式开关调节器来产生高达250V的电压，只需进行小的修改就有可能输出1kV或更高的电压。一个高转换速率运算放大器可抑制残余开关噪声，产生的总均方根噪声约为100μV（1Hz - 100kHz）。一个低电压（±10V）、高带宽信号可以以单位增益直接叠加到输出上，这使得该驱动器非常适合闭环反馈应用。数字控制实现了可重复的设定点和复杂的控制逻辑，并且该电路在±15V电压下的功耗小于150mA。
