Analog MultiplierHarshit Choudhary(11-810)

Dewang Gedia(10-817)Abhay Bhopate(11-807)

The Analog multiplier multiplies two voltage inputs given to its input.

Four Operational amplifiers are used in Inverting mode in the circuit. The initial two Operational amplifiers are used to take inputs of the voltages which needs to be multiplied. These two Operational amplifiers works as inverting logarithmic amplifiers.

The third Operational amplifier is used as an inverting adder which adds the two inputs to its terminals. These are the outputs of the initial two Operational amplifiers.

The fourth Operational amplifier is used as an inverting Antilog amplifier which generates an output which is proportional to its input.

The final output from the fourth Operational amplifier is the result of the Multiplication of two input voltages.

 

Abstract

Circuit diagram

The multiplier multiples in the range of 200.Any value within this range is achieved.

The Output of the analogue multiplier is very much dependent on the temperature.

The multiplier is tested with different inputs (0.1V X 0.1V to 20V X 10V).

Conclusion

Variable-gain amplifier Ring modulator Frequency mixer True RMS converter

Applications

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