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Compare Collpit's and Clapp's oscillator.

written 3.5 years ago by teamques10 ★ 68k

modified 2.9 years ago by pedsangini276 • 4.8k

analog electronics electronic devices and circuits

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written 3.5 years ago by teamques10 ★ 68k

Colpit's and Clapp's oscillator:

Colpitt's oscillator	Clapp's oscillator
Colpitt oscillators are actually the same circuit but with the ground point at a different location.	Clapp oscillators are actually the same circuit but with the ground point at a different location.
In  Colpitt's oscillator, the ac ground is at the collector.	In Clapp's oscillator, the ac ground is at the base.
In the Colpitts configuration, a good deal of the stray capacitance appears across the crystal, limiting the high-frequency application to about 30 MHz.	In the Clapp's configuration, a good deal of the stray capacitance appears across the crystal, limiting the high-frequency application to about 30 MHz.
In the Colpitts configuration, however, the biasing resistors are across the crystal and degrade performance at lower frequencies below about 3 MHz.	In the Clapp's oscillators, the base-biasing resistors are across large capacitors and thus do not affect the performance of the circuit.
The power output of Colpitts oscillator is moderate.	The power output of Clapps oscillator is moderate.

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