Which operational amplifier configuration is commonly used in zero crossing detectors?
Comparator configuration without feedback is used.
A zero crossing detector compares the input against 0 V and switches its output each time the input crosses zero.
This needs an open-loop comparator configuration (no feedback), where the op-amp's very high open-loop gain drives the output to saturation for the smallest polarity change of the input.
Hence, a comparator configuration without feedback is used.
Similar Questions
In an operational amplifier integrator circuit, which component acts as feedback between the output and the input?
If the input resistor of an inverting amplifier using OP-AMP is doubled and the feedback resistor remains the same, what happens to the magnitude of voltage gain?
To convert an op-amp integrator into a practical integrator (avoiding low-frequency saturation), which component is typically added in parallel with the feedback capacitor?
When analyzing a closed-loop circuit containing an ideal operational amplifier, what assumption must be applied regarding the currents entering the inverting and non-inverting input pins?
What happens to the gain of a non-inverting amplifier using OP-AMP if the feedback resistor value is increased by 5 % while keeping the input resistor constant? (Assuming the OP-AMP remains in linear range for operation.)
Important Questions from Operational Amplifiers
In order for an output to swing above and below a zero reference, the op-amp circuit requires-
An Op-Amp as a voltage follower has a voltage gain of
An oscillator circuit which is meant for converting sine wave signal into square wave signal is called a
The maximum rate that an output of an operational amplifier can change
CMRR for an Op-amp should be
