Ob-channel amplifiers: cov yam ntxwv tsis zoo, hom thiab kev faib tawm

2024 Tus sau: Henry Conors | [email protected]. Kawg hloov kho: 2024-02-12 07:52

Nyob rau hauv ntau lub tso suab, lub suab amplifier tau tsim rau hauv chav tsev. Txawm li cas los xij, thaum txuas cov neeg hais lus siab dua thiab teeb tsa lub suab nrov dua, yuav tsum siv ob-channel fais fab amplifiers. Koj tuaj yeem txuas cov amplifiers rau ob tus neeg hais lus thiab cov channel uas siv tus choj txuas. Lawv txhawb nqa low-impedance loads. Qhov txiaj ntsig tseem ceeb yog lub peev xwm los txuag kev sib hloov ua ke.

Thaum lub amplifier tau nruab rau hauv lub tso suab, lub suab tsis zoo ib txwm. Koj tuaj yeem kho qhov teeb meem no los ntawm kev txhim kho lub suab processor.

Parameters ntawm ob-channel amplifiers

Power yog qhov taw qhia tseem ceeb rau lub suab nrov. Nws los ntawm ob hom: nominal (RMS) thiab siab tshaj (PMPO). Thaum muas hauv cov ntaub ntawv, koj tuaj yeem nyeem txog lub zog ntsuas. Ntawm cov khoom nws tus kheej lawv sau txog ntau channel, uas qhia tau hais tias lub zog siab tshaj plawscov channel. Thaum muas lub amplifier, koj yuav tsum xyuas daim ntawv pov thawj uas qhia lub Hoobkas ntsuas lub zog ntawm lub cuab yeej.

Ob-channel amplifiers muaj qhov sib txuam ua ke, uas ua rau nws tuaj yeem txiav cov zaus qis, tawm hauv qhov siab. Los ntawm kev siv qhov ntsuas no, koj tuaj yeem kho qhov txiav tawm zaus maj mam thiab rov tsim cov suab nrov ntawm ib qho channel. Tus yuam sij hloov cov ntses bass thaj tsam yog qhov muaj txiaj ntsig zoo, tshwj xeeb tshaj yog thaum txuas lub subwoofer: nws muaj peev xwm ua kom cov ntses bass thaj tsam zoo dua.

Bridge kev sib txuas ua rau nws muaj peev xwm ua kom muaj zog tag nrho. Siv txoj kev no, kev sib txuas ntawm cov subwoofers muaj zog yog siv.

Ob-channel amplifiers tau nruab nrog cov khoom sib txuas rau kev sib txuas cov kab hluav taws xob. Cov kab hluav taws xob tau txais cov teeb liab los ntawm cov txheej txheem tso suab. Los ntawm overheating ntawm lub system, ib tug kiv cua yog ntsia rau hauv lub amplifiers.

Thaum xaiv lub suab amplifiers, xyuam xim rau cov chaw tsim khoom lag luam, muab qhov nyiam rau cov neeg uas tau ua pov thawj lawv tus kheej ntawm qhov zoo.

hom tsiaj

Ob-channel amplifiers yog: raj, transistor, hybrid, digital thiab tripats. Thawj hom siv lub tshuab nqus tsev hluav taws xob, thiab lub suab yog cascaded. Transistor amplifiers muaj zog dua thiab ua kom nrov nrov. Digital audio amplifiers ua haujlwm ntawm kev sib koom ua ke, muaj kev ua haujlwm siab thiab zoo suab zoo.

Hybrid amplifiers yog tsim los ntawm lub tshuab nqus tsev, semiconductors thiabintegrated circuits, combining qhov zoo ntawm hom yav dhau los.

Kev faib tawm ntawm ob-channel amplifiers

Raws li lub hauv paus ntsiab lus ntawm kev ua haujlwm, muaj ntau chav kawm ntawm ob-channel amplifiers, uas tau tham hauv qab no.

Hom amplifier	Class	Summary	txiaj ntsig
Tube	A	Muaj hwj chim qis thiab nqi dhau. Lawv distort lub suab, ua rau ib tug efficiency ntawm 20%.	Qis zog.
Y Transistor	B	High COP, cua sov dissipation tab sis tsis nrov.	Ob-channel fais fab amplifiers tau txo cov suab nrov. Compact, npaum.
Y Transistor		High COP: 75%.	Qhov kev xaiv zoo tshaj plaws rau cov khoom siv lub suab tsheb.
Hybrid	AB	Dual-channel suab amplifiers muaj qhov ua tau zoo tshaj plaws. Mode - nruab nrab ntawm hom A thiab B.	Txhua yam txiaj ntsig ntawm Chav A thiab B.
Digital	D	Digital Signal Processing Capability. SivPWM modulation and fixed frequency. Lub xub ntiag ntawm kev tswj theem du thiab lub suab bass thaj tsam txhawb nqa.	me me, suab zoo hauv nws cov purity, high efficiency.
Digital	G, N	Lub amplifier muaj lub zog hloov pauv thiab muab cov teeb liab ua tiav. Tus nqi siab.	Nyob zoo ib tsoom mloog.
Tripats	T	tso zis transistors yog hloov ntawm pseudo-random zaus nyob ntawm theem ntawm cov teeb liab tawm tswv yim.	Modulation circuits tau txais ultra-low non-linear distortion. High efficiency.

Tsheb Suab Amplifier

Lub ob-channel subwoofer amplifier yog tsim los txhawb lub suab thiab txhim kho qhov zoo ntawm lub ntim mus rau qib zoo. Yuav cov khoom siv hauv lub tsheb kom raug, xaiv nws raws li tus yam ntxwv ntawm lub subwoofer.

Ob-channel amplifiers yuav tsim lub suab sib haum xeeb rau txhua lub tso suab.