Operational Amplifier Applications Unit 6 – Full-Wave Bridge Driver/Conversion
UNIT 6 – FULL-WAVE BRIDGE DRIVER/CONVERSION
UNIT OBJECTIVE
At the completion of this unit, you will be able to determine the operating characteristics of an op
amp voltage-to-current converter by applying ac and dc input voltages. You will verify your
results by measuring circuit output current.
UNIT FUNDAMENTALS
An op amp can be configured to convert an input voltage to a proportional output current. A
typical noninverting voltage-to-current converter circuit is shown.
The op amp is configured as a noninverting voltage follower. The op amp's output constantly
changes to maintain a zero voltage differential between the + and – inputs.
Since the meter is in the feedback loop, its voltage drop is compensated by the op amp.
You can determine the output current by dividing V 2 by R2 (Io = V 2 /R2).