7/23/2019 The RC Feedback Oscillators

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 The RC feedback oscillators, particularly the Wien Bridge, are generally suitable

for frequencies up to about 1 MHz,

LC feedback  elements are normally used in oscillators that require higher

frequencies of oscillation. Also, because of the frequency limitation (lower unity-gain

frequency) of most op-amps, discrete transistors (BJT or !T) are often used as the

gain element in "# oscillators. This section introduces se$eral types of resonant LCfeedback oscillators: the Colpitts, Clapp, Hartley, Arstrong, and crystal!

controlled oscillators