Yiziphi izigaba ze-Temperature Compensated Crystal Oscillators (TCXO)?
I-Temperature Compensated Crystal Oscillator (TCXO) iwuhlobo lwe-crystal oscillator egcina ukuphuma kwemvamisa okuzinzile ngaphansi kwezimo zokushisa ezihlukene. Ihlanganisa umjikelezo wokunxeshezelwa kwezinga lokushisa ukuze kwehliswe umthelela wokushintsha kwezinga lokushisa kwemvelo ku-oscillation frequency, iqinisekisa{1}}amasignali ewashi anembe kakhulu ezindaweni ezihlukahlukene. Ama-TCXO ahlukaniswe ngokuyinhloko abe izigaba ezintathu: isinxephezelo esiqondile, isinxephezelo esingaqondile, nesinxephezelo sedijithali.
Izici Ezivamile ze-TCXOs
Ukuzinza Okuphezulu: Inikeza okukhiphayo okuzinzile ngebanga lokushisa elibanzi, inciphisa umthelela wokuhluka kwezinga lokushisa ekusebenzeni kwedivayisi.
Ukunemba Okuphezulu: Iletha{0}}amasiginali wewashi anembe kakhulu, alungele izinhlelo zokusebenza ezidinga isikhathi esinembe kakhulu.
Ukusetshenziswa kwamandla Okuphansi: Ngokuvamile yakhelwe ukusetshenziswa kwamandla okuphansi kumadivayisi eselula{0}nezinhlelo zokusebenza ezinamandla zebhethri{0}zokwelula impilo yebhethri.
Umsindo Wesigaba Esiphansi: Eminye imiklamo ye-TCXO iphinde inikeze izici zomsindo ezisezingeni eliphansi, ezibaluleke kakhulu ezinhlelweni zokuxhumana nezinye izinhlelo zokusebenza ezizwelayo ekuphazanyisweni kwesignali.
Isinxephezelo Esiqondile TCXO
I-TCXO yesinxephezelo esiqondile isebenzisa isiyingi sokunxeshezelwa kwezinga lokushisa esakhiwe ama-thermistors kanye nama-elementi e-capacitive-enamandla, axhunywe ochungechungeni ne-quartz crystal resonator ku-oscillator. Lapho izinga lokushisa le-ambient lishintsha, ukumelana kwe-thermistor kanye namandla ochungechunge olulinganayo lwekristalu kulungisa ngokufanele, ngaleyo ndlela kuncishiswe noma kunciphise ukukhukhuleka kwezinga lokushisa kwe-oscillation frequency. Le ndlela yesinxephezelo inikeza izinzuzo ezifana nesekhethi elula, izindleko eziphansi, nosayizi oncishisiwe webhodi lesifunda (PCB) kanye nezidingo zesikhala, okuyenza ifaneleke kakhulu izinhlelo zokusebenza ezihlangene,{3}}eziphansi, neziphansi{4}}zamanje. Nokho, ingase ingahlangabezani nezidingo zokunemba kwe-crystal oscillator kangcono kuno-±1 ppm.
Isinxephezelo esingaqondile TCXO
Isinxephezelo Esingaqondile Se-Analogi: Isebenzisa izinga lokushisa-izingxenye zokuzwa ezifana nezifudumezi zokushisa ukuze zenze izinga lokushisa{1}}kuya{2}}kumjikelezo wokuguqulwa kwevoltage. I-voltage ekhiqiziwe isetshenziswa ku-varactor diode exhunywe ochungechungeni nge-crystal resonator. Ushintsho lwamandla ochungechunge lwe-crystal resonator lunxephezela i-nonlinear frequency drift ye-resonator. Le ndlela yesinxephezelo ingafinyelela ukunemba okuphezulu okungu-±0.5 ppm kodwa ingase ilinganiselwe ezinhlelweni ezisebenza ngaphansi kuka-3V.
Isinxephezelo Esingaqondile Sedijithali: Ingeza i-analog-kuya-ku-digital (A/D) converter kanye nedijithali-kuya{3}}ku-analog (D/A) converter ngemva kwezinga lokushisa{4}}kuya-kumjikelezo wokuguqulwa kwevoltage ekusethweni kwesinxephezelo se-analog. Isignali esuka kunzwa yezinga lokushisa iguqulelwa kusignali yedijithali ngesiguquli se-A/D, bese sibuyela kusiginali ye-analog ngesiguquli se-D/A, futhi ekugcineni sishayele i-varactor diode ngomjikelezo ofanayo. Le ndlela yenza isinxephezelo sokushisa esizenzakalelayo, okuholela ekuzinzeni kwefrikhwensi ephezulu ye-crystal oscillator. Nokho, isifunda sokunxeshezelwa siyinkimbinkimbi futhi siyabiza.
Idijithali ye-TCXO
I-Digital TCXOs isebenzisa ubuchwepheshe bokucubungula isignali yedijithali ukuze uthole isinxephezelo esinembile sokushisa. Bahlanganisa inzwa yokushisa, i-A/D converter, isifunda sesinxephezelo sedijithali, kanye nesiguquli se-D/A ngaphakathi. Lezi zingxenye ziqapha izinga lokushisa le-ambient ngesikhathi sangempela futhi zilungise imvamisa ye-oscillation ngokunembile kusetshenziswa ama-algorithms edijithali. Le ndlela yesinxephezelo inikeza izinzuzo ezifana nokunemba kwesinxephezelo esiphezulu, isivinini sokuphendula esisheshayo, nokuzinza okuhle kakhulu, nakuba iza ngezindleko eziphakeme uma kuqhathaniswa.