Misalai Clapp na iya kama?

Mai Tsarki da Clapp Oscillator?

Clapp Oscillator

Clapp oscillator (ko da aka kira Gouriet oscillator) shine LC electronic oscillator wanda yake amfani da zahiri mai kyau da tare da uku na capacitors don bincike frequency na oscillator (titta diagram na circuit ta haka). LC oscillators sun amfani da transistor (ko vacuum tube ko wani abu mai jirgin sama) da kuma positive feedback network.

Clapp oscillator shine wata Colpitts oscillator tare da capacitor (C3) mai fiye a gida da inductor a cikin tank circuit, kamar yadda ake nuna a diagram na circuit ta haka.

Na biyu da capacitor mai fiye, duka abubuwan da suka shiga da takarda masu lafiya su ne kamar yadda ke nuna a cikin Colpitts oscillator.

Saboda haka, yadda wannan circuit ya yi aiki shine mafi girma da yadda Colpitts ya yi, inda feedback ratio yana tsara waɗannan oscillations. Amma frequency na oscillation a cikin Clapp oscillator yana nuna

Gaskiya, C3 yana zama da ma'adawa mai kadan da suka da duwatsuwa da uku na capacitors. Wannan shine saboda, a wasu frequencies masu yawan, idan C3 yana kadan, inductor yana zama mai yawa, wanda yana taimakawa wajen yi amfani da kuma yana haifar da tushen stray inductance.

Amma, C3 yana bukatar da zama da rarrabe. Saboda, idan an zaɓe ita da ma'adawa mai kadan, ba zan iya samun oscillations ba saboda L-C branch zai faila don samun net inductive reactance.

Amma, a nan ya kamata a lura cewa, idan C3 an zaɓe ita da ma'adawa mai kadan da C1 da C2, capacitance na gaba yana da muhimmanci a kan ita.

Saboda haka, equation na frequency zai iya sauti

Kuma, cewa yana da capacitor mai fiye, zai iya taimaka waɗannan Clapp oscillator daidai zuwa Colpitts inda ana buƙata don canza frequency, kamar yadda ke nuna a Variable Frequency Oscillator (VCO). Dalilin haka zai iya bayyana kamar haka.

A cikin Colpitts oscillator, C1 da C2 suna bukatar don canza frequency na aiki. Amma a lokacin da wannan yake faru, feedback ratio na oscillator yake canza wanda yake haifar da output waveform.

Wata halin da ya ba wannan tambayar yana ba ce, ya kamata a fada C1 da C2 domin yin variable capacitor mai fiye.Ko da ƙarin, hakan shine cewa C3 ya yi a cikin Clapp oscillator, wanda yana taimaka wajen samar da frequency masu yawan da Colpitts.

Za a iya yanayi frequency stability na circuit tare da yin temperature-controlled chamber da kuma amfani da Zener diode don ci gaba supply voltage.Kuma, values na C1 da C2 suna haifar da stray capacitances, ba C3 ba.

Wannan na nufin cewa resonant frequency na circuit yana iya haifar da stray capacitances idan akwai C1 da C2, kamar yadda ake nuna a cikin Colpitts oscillator.Amma, idan akwai C3 a cikin circuit, changes na C1 da C2 ba zan haifar da resonant frequency sosai, saboda dominant term yana zama C3.

Daga baya, Clapp oscillators suna da yawan compact saboda suke amfani da capacitor mai kadan don tune oscillator a matsayin frequency band mai yawa. Wannan shine saboda, har zuwa da ƙaramin change na value na capacitance, frequency na circuit yana canzawa da ƙarami.

Kuma, suke nuna Q factor mai yawa da L/C ratio mai yawa da circulating current mai kadan, musamman da Colpitts oscillators.Kowane, ya kamata a lura cewa waɗannan oscillators suna da inganci mai yawa, saboda haka ana zama da ake da amincewa, hali na frequency range mai kadan.