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. 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. The bias currents of the Darlington output buffers on the LM13700 are independent of the Iabc pin. This may result in performance superior to that of the LM13600 in audio applications. This chip historically has been useful in audio electronics, especially in analog synthesizer circuits like voltage controlled oscillators, voltage controlled filters, and voltage controlled amplifiers.

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