Pulse-Width Modulated Disk Servo

Notes: The schematic entry program has only a polarized capacitor symbol. Some capacitors must be non-polarized. C6, C8 should be non-polarized electrolytic or film capacitors, not polarized as shown.

R16, R15, C6 make up the lead-lag loop filter. C8 provides an additional lead term to compensate motor/disk inertia.

Mechanical TV PWM disk servo circuit

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