A selective detector amplifier for 10-10 000 c/s
G H Rayner · Journal of Scientific Instruments · 1953
An amplifier for use as a detector in bridge and other networks for which a null indication is required, is described. It can be tuned by means of parallel-T feedback networks to any frequency between 10 and 10 000 c/s. Noise is equivalent to an input signal of 0.2 μV across 10 5 Ω.