A High-Stability, Wide-Band, Low-Noise Transductor Circuit Suitable for High-Precision Magnet-Current Regulators

Typical performance of this transductor circuit includes a long-term stability of a few parts in 105, an output noise level less than 0.002% of full output voltage, and a pass band from 0 to 1 MHz. The circuit provides low-pass, band-pass, and high-pass sections, suitably designed to provide a uniform frequency response. The circuit configuration inherently filters out the commutation noise, thus providing a high signal-to-noise ratio.