UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Technics SU-V60. Voltage regulator

Radio Wrangler · 6th Apr 2019, 7:47 pm

The FETs with the gate-source connected are constant current sources. They sometimes get drawn as current source symbols or as diodes. They used to be made in a range of current values.

Theoretically you could do this with ordinary FETs but the variation in Idss from part to part is a major problem. These parts are from a selection process.

David

6th Apr 2019, 7:47 pm	#2
Radio Wrangler Moderator Join Date: Mar 2012 Location: Fife, Scotland, UK. Posts: 22,876	Re: Technics SU-V60. Voltage regulator The FETs with the gate-source connected are constant current sources. They sometimes get drawn as current source symbols or as diodes. They used to be made in a range of current values. Theoretically you could do this with ordinary FETs but the variation in Idss from part to part is a major problem. These parts are from a selection process. David __________________ Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done