[sdiy] On the topic of ring modulation (Using FETs instead of diodes?)

[Donald Tillman]

On Aug 14, 2014, at 6:03 AM, Tom Wiltshire <tom at electricdruid.net> wrote:

> Perhaps you could try using four precision rectifier circuits in the ring configuration to overcome the diode turn-on threshold. Diode ring modulators usually use germanium diodes for the lower threshold voltage, but with the precision rectifier circuit, you could probably use cheap silicon diodes - 1N4148s or whatever.

It wouldn't be a ring modulator. 

The diode ring modulator depends on the diode nonlinearity, which the precision rectifier circuit doesn't have.

  -- Don

--
Don Tillman
Palo Alto, California
don at till.com
http://www.till.com