Electronics - Special-Purpose Op-Amp Circuits - Discussion


When using an OTA in a Schmitt-trigger configuration, the trigger points are controlled by

[A]. the Iout
[B]. the IBIAS
[C]. the Vout
[D]. both Iout and IBIAS

Answer: Option D


No answer description available for this question.

Divya Gupta said: (Aug 26, 2014)  
The threshold level are set by the current through resistor connected via the non-inverting terminal. The max. output current in the OTA equals the bias current i.e. the saturated output states I(out) = I(bias).

Aman said: (Mar 3, 2017)  
The operational transconductance amplifier (OTA) is an amplifier whose differential input voltage produces an output current.

Thus, it is a voltage controlled current source (VCCS). There is usually an additional input for a current to control the amplifier's transconductance. The OTA is similar to a standard operational amplifier in that it has a high impedance differential input stage and that it may be used with negative feedback.

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