Mike Irwin

Mike Irwin

Shawville, PQ, Canada

Areas of interest of the author: Oscillators Analogue Design

Publications on RadioLocman by the author Mike Irwin:

  1. Transconductance Amp Gives Oscillator Reciprocal Response
    The circuit in Figure 1 is a variation on the familiar integrator/comparator triangle-wave oscillator, which you typically implement with two op amps. An integrator and a comparator connect in a positive-feedback loop; the comparator drives the integrator and vice versa. A...
    Jun 21, 2022
  2. Op Amp Linearizes Attenuator Control Response
    Professional-audio equipment commonly uses Analog Devices‘ high-performance, quad-voltage-controlled SSM2164 attenuator. The control response is –30 dB/V, with 0 V producing unity gain. Attenuation increases as the applied control voltage increases in the...
    Jun 30, 2020
  3. Op Amp Linearizes Response of FET VCA
    FETs find common use in VCAs (voltage-controlled amplifiers) and attenuators, in which the FET serves as a variable resistance. A control voltage applied to the gate sets the channel resistance and overall circuit gain. You frequently need to select individual FETs because of...
    Dec 25, 2018