Linear Integrated Circuits: Unit IV: Special ICs

Analog Voltage Multiplier Circuit

Circuit Diagram, Operating working principle, Derivation

Home | Department: EEE Department | Subject: Linear Integrated Circuits |

Using log and antilog amplifiers, the circuit can be built to obtain the output proportional to the product of the two input voltages. The circuit is called analog voltage multiplier.

Analog Voltage Multiplier Circuit

Using log and antilog amplifiers, the circuit can be built to obtain the output proportional to the product of the two input voltages. The circuit is called analog voltage multiplier. The circuit is shown in the Fig. 4.6.1.

The equations (4.6.1) and (4.6.2), are written according to the theory of logarithmic amplifiers.

Now op-amp A 3 is non-inverting amplifier with unity gain.

Key Point Thus the output is proportional to the product of two analog inputs V₁ and V₂

Review Questions

1. Explain how the log-antilog method can be to build a multiplier

AU : Dec.-04, Marks 6

2. With relevant diagrams explain multiplier with op-amp.

AU : Dec.-10, Marks 8

Linear Integrated Circuits: Unit IV: Special ICs : Tag: : Circuit Diagram, Operating working principle, Derivation - Analog Voltage Multiplier Circuit

Home | Department: EEE Department | Subject: Linear Integrated Circuits |

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