LM13700/LM13700A Dual Operational Transconductance Amplifiers with Linearizing Diodes and

LM13700/LM13700A Dual Operational Transconductance Amplifiers with Linearizing Diodes and


General Description
The LM13700M series consists of two current controlled
transconductance amplifiers, each with differential inputs
and a push-pull output. The two amplifiers share common
supplies but otherwise operate independently. Linearizing diodes
are provided at the inputs to reduce distortion and allow
higher input levels. The result is a 10 dB signal-to-noise improvement
referenced to 0.5 percent THD. High impedance
buffers are provided which are especially designed to
complement the dynamic range of the amplifiers. The output
buffers of the LM13700 differ from those of the LM13600 in
that their input bias currents (and hence their output DC levels)
are independent of IABC. This may result in performance
superior to that of the LM13600 in audio applications.
Features
n gm adjustable over 6 decades
n Excellent gm linearity
n Excellent matching between amplifiers
n Linearizing diodes
n High impedance buffers
n High output signal-to-noise ratio
Applications
n Current-controlled amplifiers
n Current-controlled impedances
n Current-controlled filters
n Current-controlled oscillators
n Multiplexers
n Timers
n Sample-and-hold circuits


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