LM13700

The LM13700 is an integrated circuit (IC) containing two current-controlled operational transconductance amplifiers (OTA), each having differential inputs and a push-pull output.

[1] Linearizing diodes at the input can optionally be used by applying a bias current into Ibias to reduce distortion and allow increased input levels.

The output bias can be programmed using an optional current into the Iabc pin.

Two unconnected Darlington emitter follower output buffers capable of 20 mA each can be optionally connected to each OTA's output to complement the OTA's wide dynamic range.

While both an OTA and an op-amp have a pair of differential voltage inputs and a single output, an OTA outputs a current rather than a voltage.

Schematic symbol for an OTA has inverting (V in- ) and noninverting (V in+ ) inputs, power supply lines (V + and V − ), two biasing inputs (I abc and I bias ), and a single output current I out .