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Clapp, Vackář, and Seiler Oscillators - Solid-state Devices and Analog Circuits - Day 6, Part 12
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The Clapp, Vackář, and Seiler oscillators are based on the Colpitts oscillator.
The Clapp oscillator adds a variable capacitor in the inductor leg of the tank circuit. This capacitor is typically about one-tenth of the combined capacitance of the two capacitors on the other leg of the tank circuit. Having a lower capacitance gives the variable capacitor a greater effect on the frequency (lower capacitance causes higher capacitive reactance).
The Vackář oscillator moves the inductor out of the tank circuit and closer to the transistor's collector. This gives the Vackář oscillator greater frequency and voltage stability.
The Seiler oscillator uses a capacitor network to provide positive feedback from the emitter to the base of the transistor.
The Clapp, Vackář, and Seiler oscillators are based on the Colpitts oscillator.
The Clapp oscillator adds a variable capacitor in the inductor leg of the tank circuit. This capacitor is typically about one-tenth of the combined capacitance of the two capacitors on the other leg of the tank circuit. Having a lower capacitance gives the variable capacitor a greater effect on the frequency (lower capacitance causes higher capacitive reactance).
The Vackář oscillator moves the inductor out of the tank circuit and closer to the transistor's collector. This gives the Vackář oscillator greater frequency and voltage stability.
The Seiler oscillator uses a capacitor network to provide positive feedback from the emitter to the base of the transistor.
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Clapp, Vackář, and Seiler Oscillators - Solid-state Devices and Analog Circuits - Day 6, Part 12
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Oscilador SMD Clase 20
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