2007-02-01 06:27:47 · 3 answers · asked by a a 1 in Science & Mathematics ➔ Engineering
A switching amplifier is not like a conventional amplifier. It consists of a comparator, a switch which can pump charge in or out of a storage element. The storage element (say a capacitor) is then fed through a low pass filter. The filter output is usually buffered to become the output and is also fed back to on input of the comparator. The other side of the comparator is the input. The circuit is clocked and when the clock goes active, the output of the filter (amplifier) is compared to the input and if the output of the amp is too low, charge is pumped into the storage element. If the opposite is true, charge is pulled out of the storage element.
If the filter is good and the clock rate is high, the output will follow the input with gain. Gain is set by the feedback loop. The advantage is that the devices in the charge pump are run in switching mode (high current very low voltage) and power is saved.
Try here ---
http://en.wikipedia.org/wiki/Switching_amplifier
2007-02-01 06:53:58 · answer #1 · answered by Gene 7 · 0⤊ 0⤋
A swithcing amplifiers is rally an operational amplifier.
the gain of an operational amplifier is "one".therefore its tranferfunction is also one that means that the input signal is equal to the out put. Its is Useful for adding intergrating and diferentiating circuit .This is how computer logic is configured.
2007-02-01 06:34:48 · answer #2 · answered by goring 6 · 0⤊ 1⤋
The answer of goring is out of track. The correct one is the one obtained from wikipedia.
2007-02-01 07:58:15 · answer #3 · answered by giorgio s 4 · 0⤊ 0⤋