Modulator na-eme ihe bụ sekit nke akara ngosi na-achịkwa akụkụ nke ebili mmiri na-ebu ibu.E nwere ụdị abụọ nke usoro mgbanwe nke sine wave: modulation na-aga n'ihu na nke na-apụtaghị ìhè.Ụkpụrụ nke modulation na-aga n'ihu bụ iji mgbama modulating ozugbo gbanwee parampat nke loop resonant, nke mere na akara ngosi nke ụgbọelu ahụ site na resonant loop iji mepụta mgbanwe na-agbanwe oge ma na-etolite ebili mmiri na-agbanwe agbanwe;Usoro modulation nke na-apụtaghị ìhè na-ebu ụzọ gbanwee njupụta nke ebili mmiri a na-emegharị emegharị, wee gbanwee mgbanwe njupụta n'ime mgbanwe nke oge, ka ọ wee nweta mgbanwe nke usoro.Usoro a bụ Armstrong mere na 1933, nke a na-akpọ Armstrong modulation method
Igwe ngbanwe ngwa ngwa na-achịkwa nke eletrọnịkị bụ netwọọdụ ọdụ ụgbọ mmiri abụọ ejiri na-enye ọdịiche nke oge n'etiti nsonaazụ na ntinye ntinye nke nwere ike ijikwa akara njikwa (n'ozuzu oke voltaji DC).Ọnụ ego ngbanwe nke usoro nwere ike ịdịgasị iche na-aga n'ihu site na iji akara njikwa ma ọ bụ n'ụkpụrụ a kara aka.A na-akpọ ha ndị na-agbanwe akụkụ analọgụ na ndị na-agbanwe oge dijitalụ n'otu n'otu.The phase modulator bụ ọnụọgụ ọnụọgụ abụọ na-agbanwe igodo igodo n'ime sistemụ nkwurịta okwu ngwa ndakwa nri, nke na-eji ebili mmiri na-aga n'ihu na-emegharị akara ngosi.Enwere ike ikewa mgbanwe mgbanwe nke usoro nke sine ka ọ bụrụ modulation nke oge na-apụtaghị ìhè na usoro mgbanwe ozugbo.Site n'iji njikọ ahụ na akụkụ njupụta nke sine wave bụ ihe dị mkpa nke ugboro ole ozugbo, ebili mmiri na-emegharị ugboro ugboro nwere ike gbanwee ka ọ bụrụ ifegharị modulated (ma ọ bụ ọzọ).Ihe sekit modulator a na-ejikarị eme ihe bụ varactor diode phase modulator.Sekit modulation nke na-apụtaghị ìhè dị mgbagwoju anya karịa sekit modulation nke a na-ahụ anya.Ụkpụrụ ya bụ na otu ụzọ nke mgbaàmà ụgbọelu na-atụgharị site na 90° phase shifter wee banye n'ụdị amplitude-modulator kwesịrị ekwesị iji kwụsị njupụta modulation nke ụgbọelu ahụ.Mgbe attenuation kwesịrị ekwesị, a na-agbakwunye mgbaàmà enwetara na ụzọ ọzọ nke onye na-ebu ya ka ọ pụta ìhè njupụta-modulating.Ihe e ji mara sekit a site na nkwụsi ike ugboro ugboro, mana ngbanwe nke oge enweghị ike ibu oke (n'ozuzu ihe na-erughị 15 Celsius) ma ọ bụ nnukwu mgbagha.A na-ejikarị modulator usoro dị mfe na mgbasa ozi mgbasa ozi FM.
