Skip to content
July 31, 2019 / consort3

Emitter follower oscillator

It is often held that a passive circuit cannot have gain. This emitter follower circuit with a gain of 1 oscillates. It is my version of “a cathode follower oscillator” by James G. Holbrook (1955) where he demonstrates that a passive circuit can indeed have gain! Frequency is 842 Hz.

holbrook

holbrook1

To show the passive circuit has gain, I simulated it

holbrook2

holbrook2a

Oscillation happens where the phase is zero.

 

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: