Voltage Controlled Attenuator Circuit
Voltage Controlled Attenuator Circuit . The rfsa3023 draws a very low 1ma current and is packaged in a small 3mmx 3mm qfn. Bandwidths spanning dc to 65 ghz; F2258 Wideband Voltage Variable RF Attenuator from www.schematics.com The control voltage via vr1 is sent to q1a's gate without attenuation. Im trying to create a dc voltage attenuator which linearly scales the loss relative to an applied control voltage vc. In any rf system, there is a need for a constant impedance and this design provides an acceptable match to 50ω over a wide range of attenuation levels.