SG1731/SG2731/SG3731 DC MOTOR PULSE WIDTH MODULATOR DESCRIPTION The SG1731 is a pulse width modulator circuit designed specifically for DC motor control.
It provides a bi-directional pulse train output in response to the magnitude and polarity of an analog error signal input.
The device is useful as the control element in motor-driven servo systems for precision positioning and speed control, as well as in audio modulators and amplifiers using carrier frequencies to 350 KHz.
The circuit contains a triangle waveform oscillator, a wideband operational amplifier for error voltage generation, a summing/scaling network for level-shifting the triangle waveform, externally programmable PWM compara...

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