Opвђ“amp Circuits Manual. Including Ota Circuits -

The fundamental relationship governing an OTA is defined by its transconductance, which relates the output current ( Ioutcap I sub o u t end-sub ) to the differential input voltage (

with an external control voltage, the gain of the signal path can be modulated dynamically. Op–Amp Circuits Manual. Including OTA Circuits

: Standard op-amps almost always use negative feedback to set a fixed gain. In contrast, OTAs are often used in open-loop configurations because the output current is naturally limited by the bias current, preventing saturation in many applications. 2. Understand the Transfer Function The fundamental relationship governing an OTA is defined

: Because the output can be "turned off" by setting IABCcap I sub cap A cap B cap C end-sub preventing saturation in many applications.

: An OTA can simulate a resistor whose value is determined by the bias current, allowing for digital or analog control of resistance in a circuit. Understanding Operational Transconductance Amplifiers | PDF