Design an amplifier circuit with an out put of 12V Use two p

Design an amplifier circuit with an out put of 1-2V. Use two pole Butterworth filters to limit the frequency range to 50Hz-15kHz. The input is to be a peizo vibration sensor which has an output of 10-100mV. In the design be sure to account for the 2.4nF internal capacitance of the sensor. Be sure to show calculations for component values and the transfer function.

Solution

A)Setup and working of this stereo power amplifier circuit is somewhat similar to the BA5406 based stereo amplifier circuit published previously. C10 and C11 are DC decoupling capacitors which block any DC level present in the input signals. C2 and C6 couples the amplifiers left and right power outputs to the corresponding loud speakers. C1 and C5 are bootstrap capacitors. Bootstrapping is a method in which a portion of the amplifiers is taken and applied to the input. The prime objective of bootstrapping is to improve the input impedance. Networks R1,C3 and R2,C7 are meant for improving the high frequency stability of the circuit. C4 is the power supply filter capacitor. S1 is the standby switch. C8 is a filter capacitor. R3 and R4 sets the gain of the left and right channels of the amplifier in conjunction with the 39K internal feedback resistors.

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