So far, there have been several studies on basic characteristics of IPMC transducers, but the characterization of the diluent effect, which is the most sensitive parameter, of IPMC sensors for specific applications are relatively rare. Ionic polymer-metal composites (IPMCs), with attracting properties like flexibility, light weight, easy processing, resilience and high sensitivity, are strongly dependent upon their diluent level which is not stable over time and this limits them to be reliable in practical applications. These have been completed in the time domain (transient analysis). When the switches (the 5-bits of SPI) are activated, the feedback capacitor is set to 15 pF, resulting in the optimum stability, output voltage, settling time, and slew rate. On the other side, the phase margin is also stable. AOL and UGF are set for varied all switches (AOL 107.26 dB and UGF 8.6 MHz), however NG exhibits stability when the feedback capacitor is larger than 15 pF and the feedback resistance is fixed since the design has a Rate-Of-Closure (ROC) smaller than 20 dB. The open loop (AOL), Noise Gain (NG), and phase margin have all been demonstrated in ac analysis. The suggested circuit was developed and evaluated using discrete components also, the programmable circuit design and results were generated using Linear Technology's Integrated Circuit Emphasis (LTSPICE) simulation software. The analog switch was used to connect serial to RC and subsequently to SPI. A programmable charge amplifier is created by a host digitally (Serial Peripheral Interface (SPI)) and a network of negative feedback, which is a network of resistors and capacitors (RC) connected between an output and inverter input node of an op-amp, where the feedback capacitor is 15 pF and resistors are 12.5, 25, 50, 100, and 200 k. The purpose of this paper was to design and explain a novel approach for programmable charge amplifiers. An operational amplifier (op-amp) circuit operates the charge amplifier. This paper describes the design and operation of a programmable charge amplifier for a piezoelectric sensor.
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