Preamplifier (preamplifier) bụ eletrọnịkị ampilifaya nke na-akwado obere mgbama eletrik maka mmụba ma ọ bụ nhazi ọzọ.
A na-edobekarị ihe nrịbama n'akụkụ ihe mmetụta iji belata mmetụta nke mkpọtụ na nnyonye anya. A na-eji ya kwalite ike mgbaama iji kwọba eriri ahụ gaa na ngwa bụ isi na-ewedaghị oke mgbama na mkpọtụ (SNR).
Ọrụ mkpọtụ nke preamplifier dị oke egwu; dị ka Friis si usoro, mgbe uru nke preamplifier dị elu, SNR nke mgbaàmà ikpeazụ kpebisiri ike site na SNR nke ntinye ntinye na ụda mkpọtụ nke preamplifier.
N'ime sistemụ ọdịyo nke ụlọ, enwere ike iji okwu 'preamplifier' mgbe ụfọdụ kọwaa akụrụngwa nke na-agbanwe n'etiti isi mmalite ọkwa dị iche iche wee tinye njikwa olu, ka ọ nweghị nkwalite n'ezie nwere ike itinye aka.
N'ime sistemụ ọdịyo, ihe nrịbama nke abụọ na-abụkarị ihe a na-amụba ike (amplifier ike). Preamplifier na-enye uru voltaji (dịka ọmụmaatụ site na 10 millivolts ruo 1 volt) mana enweghị uru dị ugbu a.
Igwe nkwuputa ike na-enye ugbu a dị elu dị mkpa iji kwọọ igwe okwu.
Preamplifiers nwere ike ịbụ: itinye n'ime ụlọ ma ọ bụ chassis nke ampilifaya ha na-eri nri n'ụlọ dị iche etinyere n'ime ma ọ bụ n'akụkụ ebe mgbama, dị ka ihe ntụgharị, igwe okwu ma ọ bụ ngwa egwu.
Ụdị Preamplifier: Ụdị atọ bụ isi nke preamplifiers dị: preamplifier nke nwere mmetụta dị ugbu a, ihe nrịbama parasitic-capacitance preamplifier, na ihe nrịbama ụgwọ-sensitive.
Abụ m Joost Nusselder, onye nchoputa Neaera na onye na-ere ọdịnaya, nna, ma hụ n'anya ịnwale akụrụngwa ọhụrụ na guitar n'obi oke agụụ m, yana ndị otu m, anọ m na-ekepụta akụkọ blọgụ miri emi kemgbe 2020 iji nyere ndị na-agụ akwụkwọ na-eguzosi ike n'ihe aka na ndekọ na ndụmọdụ guitar.
