Phase modulator - Forward introduction
Maziko a gawo modulator modulation:
Chizindikiro cha mawayilesi chimakhala ndi chonyamulira chozungulira ngati sine wave, womwe ndi maziko a chizindikiro. The matalikidwe yomweyo amatsatira pamapindikira mu zabwino ndiyeno zoipa mbali, kubwerera poyambira pambuyo mkombero umodzi wathunthu - amatsatira pamapindikira a sine yoweyula. Sino wave ingathenso kuyimiridwa ndi kusuntha mozungulira mfundo yozungulira, ndipo gawo pa mfundo iliyonse ndi Angle pakati poyambira ndi mfundo pa mawonekedwe ozungulira. Gawoli limapitanso patsogolo pakapita nthawi, kotero kuti mfundo za mawonekedwe a waveform zitha kunenedwa kuti zimakhala ndi kusiyana pakati pawo. Kusinthasintha kwa gawo kumagwira ntchito posintha gawo la chizindikiro, ndiye kuti, kusintha momwe mfundoyo imayendera kuzungulira bwalo. Ngati kusinthasintha sikukugwiritsidwa ntchito, izi zimasintha gawo la chizindikiro. Mwanjira ina, liwiro lozungulira kuzungulira bwalo limasinthidwa molingana ndi tanthauzo. Pachifukwa ichi, m'pofunika kusintha mafupipafupi a chizindikiro mu nthawi yochepa. Mwa kuyankhula kwina, pamene kusintha kwa gawo kumagwiritsidwa ntchito pa chizindikiro, pali kusintha kwafupipafupi, ndipo mosiyana. Magawo ndi ma frequency amalumikizana mosadukiza chifukwa gawo ndi gawo limodzi la ma frequency.
CHOLINGA:Kuwonjezera zolowetsa-zotulutsa zodzipatula za gawo lonse la modulator popereka zero setting circuit yomwe imapanga mphamvu yamagetsi kuchokera pa galimoto yoyendetsa zero pamene chizindikiro chodulira chonyamula chikugwiritsidwa ntchito.CONSTITUTION:Diode switch circuit 10 ndi magawo asanu otsika-pass fyuluta mtundu kusintha dera ntchito PIN diode 12 ndi 14; pamene ma voliyumu amasiyana molunjika amagwiritsidwa ntchito ku diode 12 ndi 14 kuchokera kudera lowongolera 16, chosinthira chimayatsidwa ndipo ma voliyumu akutsogolo akugwiritsidwa ntchito, ma diode 12 ndi 14 amawongolera kuti apange dera lalifupi, potero akudula chonyamulira. Control circuit 16 imagwiritsa ntchito ma voliyumu akutsogolo ku diode 12 ndi 14 omwe amagwiritsidwa ntchito ndi chizindikiro chodulira chonyamula. Driving circuit 30, pamene chonyamulira chodulira chizindikiro chikugwiritsidwa ntchito kudzera pa mzere 40, imayang'anira mokakamiza chizindikiro chamagetsi kuti chiperekedwe magawo awiri a PSK modulator 20 mpaka zero.
Zhuo Meng Shanghai Auto Co., Ltd. yadzipereka kugulitsa zida zamagalimoto za MG&MAUXS zolandiridwa kuti mugule.
