Comments on ´New canonic variable frequency RC harmonic oscillator with two similar sections´ (and reply)

For original paper see ibid., vol.24, pp.1320-21 (1988). The parallel path oscillator described by Ganguly and Ganguly may be modified to incorporate two identical high-pass or lowpass CR sections. This modification results in improved selectivity Q of the open-loop bandpass transfer function and hence in improved frequency stability of the oscillator.