forward voltage to be exceeded, the diodes begin to conduct, reducing the
effective value of R
f
and consequently the loop gain. Jacob
(1993,
301) and
Jung (1986,451) describe an amplitude stabilizing circuit based on the use of a
field effect transistor to reduce the loop gain at high signal levels. The high
impedance input of this device minimizes the clipping effect on the generated
waveform.
The computer program Wien Bridge Oscillator Design (Appendix A.9)
enables the required component values for a specified frequency of oscillation
to be determined using Equation (4.21).
4.4
Reference ...
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