Low-Frequency Crystal Oscillator Circuit

Posted on Jan 10, 2013

Ql, Q2, and the associated circuitry form a modified astable multivibrator in which the loop gain is automatically adjusted to the threshold of oscillation by means of field effect transistor Q3. Q4 linearly amplifies the signal present at the collector of Q2 and isolates the oscillator section of the circuit from the output. This stage features wideband operation and delivers a clean 2.5-V amplitude sine wave into a resistive load greater than or equal to 20 kQ.

Low-Frequency Crystal Oscillator Circuit
Click here to download the full size of the above Circuit.

The stage comprising Q5 has a voltage gain of 1 and its sole purpose is to isolate the nonlinear effects of rectifier D1 from the output.

Leave Comment

characters left:

New Circuits



Popular Circuits

Mosquito repelant circuit
Phase tracking three-phase generator
L4970A Easy 5V 10A Switching Regulator circuit
convert square wave inverters to sine wave inverter
automatic 12v lead acid battery charger
Dual Power Amplifier Using TDA7293 MOSFET IC
Hewlett-Packard HP-200C audio oscillator
30W Hybrid amplifier 01