Bias oscillators are fundamentally required in audio (analog) tape recorders to linearize the tape's modulation transfer function (MTF). This paper presents a review of the requirements imposed upon the bias oscillator. The topics of 1) the bias oscillator as a source of radio-frequency-interference (RFI) to other circuits in the tape recorder, as well as 2) the circuit integrity required of the bias oscillator in order to record ultimate-fidelity analog signals, are treated.

Author: Talbot, Daniel B.
Affiliation: dbx, Inc., Newton, MA
AES Convention: 63 (May 1979) Paper Number: 1484
Publication Date: May 1, 1979

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