Grounding piezoelectric ceramic charge driver with composite low-frequency channel
A piezoelectric ceramic and driver technology, applied in electrical components, impedance networks, etc., can solve the problems of difficulty in generalization and poor low-frequency characteristics, and achieve the effects of expanding the effective frequency band, shortening the settling time, and expanding the control bandwidth.
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[0014] Combine figure 2 To describe this embodiment, this embodiment adopts a grounded structure, that is, the piezoelectric ceramic is connected between the output terminal of the high voltage operational amplifier and the ground. figure 2 Medium, C 1 And C p Form a high-frequency AC path, gain K and adjustable resistance R form a low-frequency AC path, gain K 1 And adjustable gain K 2 Form a non-linear compensation loop.
[0015] The high-frequency AC path is the main working circuit of the charge driver to eliminate the hysteresis and nonlinearity of piezoelectric ceramics. The lower cut-off frequency of the high-frequency path is the corner frequency of the driver, which determines the effective working frequency band of the driver. Adjustable resistance R and piezoelectric ceramic C p Uniquely determined turning frequency Represents the resistance value of the adjustable resistor R, Represents piezoelectric ceramic C p On the one hand, changing the resistance value of ...
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