Linear application and Comparator and level detector.pptx
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This document discusses two types of voltage to current converters using operational amplifiers: the floating load voltage to current converter where the load current is controlled by a resistor and proportional to 1/R, and the ground load voltage to current converter. It also mentions comparators as a nonlinear application of op-amps where the op-amp compares two input voltages in an open-loop configuration to determine which is greater.
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Linear application and Comparator and level detector.pptx
- 1. Voltage to Current Converter Using Op-Amp
- 2. Voltage to current converter using Opamp • Floating Load Voltage to Current Converter • Ground Load Voltage to Current Converter
- 3. • Floating Load Voltage to Current Converter The load current is controlled by the resistor, R. Here, the proportionality constant is 1/R. So, this converter circuit is also known as Trans-Conductance Amplifier. Other name of this circuit is Voltage Controlled Current Source. Current series negative feedback amplifier
- 4. • Ground Load Voltage to Current Converter
- 5. Current to Voltage Converter
- 8. Comparators ■ A comparator is a specialized nonlinear op-amp circuit that compares between two input voltages and produces an output state that indicates which one is greater. Comparators are designed to be fast and frequently have other capabilities to optimize the comparison function. ■ In this application, the op-amp is used in the open-loop configuration, with the input voltage on one input and a reference voltage on the other.