| 词条 | Multistage amplifier |
| 释义 |
}}{{merge from|Cascade amplifier|date=November 2018|discuss=Talk:Multistage amplifier#Merge from Cascade amplifier}} For many applications, the performance obtainable from a single-stage amplifier is often insufficient , hence several stages may be combined forming a multistage amplifier. These stages are connected in cascade, i.e. output of the first stage is connected to the input of second stage, whose output becomes input of third stage, and so on. Overall gainThe overall gain of a multistage amplifier is the product of the gains of the individual stages (ignoring potential loading effects): Gain (A) = A1* A2*A3 *A4 *... *An. Alternately, if the gain of each amplifier stage is expressed in decibels (dB), the total gain is the sum of the gains of the individual stages: Gain in dB (A) = A1 + A2 + A3 + A4 + ... An Inter-stage couplingDepending on the manner in which the different amplifier stages are connected, one of the following amplifiers may result:
Transformer coupled amplifiers are often also tuned amplifiers. The inductance of the transformer windings serves as the inductor of a LC tuned circuit. If both sides of the transformer are tuned it is called a double-tuned amplifier. Staggered tuning is where each stage is tuned to a different frequency in order to improve bandwidth at the expense of gain. {{DEFAULTSORT:Multistage Amplifiers}}{{Electronics-stub}} 1 : Electronic amplifiers |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。