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66# 逸.风
看来有不少人误会了…甲类就是纯甲类,两者无分别…我是说OTL只能做到类甲…即类似甲类状态并不是甲类…拜托那些扔砖头前先用心看清楚贴再扔好不?汗
我虽然没做1969,但是请问甲类和类甲主要区别在什么地方?
下面有甲类的定义(也提到了亚甲),阁下说的类甲是怎么定义的?是否就是下文提到的 Subclass A2?而亚甲(Subclass A2)是有时用来指胆机的特定的工作状态的。
Class A
100% of the input signal is used (conduction angle Θ = 360° or 2π; i.e., the active element remains conducting[5] (works in its "linear" range) all of the time. Where efficiency is not a consideration, most small signal linear amplifiers are designed as Class A. Class A amplifiers are typically more linear and less complex than other types, but are very inefficient. This type of amplifier is most commonly used in small-signal stages or for low-power applications (such as driving headphones). Subclass A2 is sometimes used to refer to vacuum tube Class A stages where the grid is allowed to be driven slightly positive on signal peaks, resulting in slightly more power than normal Class A (A1; where the grid is always negative[6]), but incurring more distortion
再下面是更为简明的解释
Class A
The amplifier conducts current throughout the entire cycle (360º). The Class A design is the most inefficient and is used in low-power applications as well as in very high-end stereo. Such devices may be as little as 15% efficient, with 85% of the energy wasted as heat. |
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