Design a class B audio power amplifier that will deliver 50

Design a class B audio power amplifier that will deliver 50 W TO AN 8ohm load. I know that the output voltage should be 16.9 V but show me how I can ensure that this voltage is at the output by manipulating Vcc or Vin.through some formula?

Solution

class B audio power amplifier 50W and 8 ohm load

specified that output voltage is 16.9v

there is no standing bias current (the quiescent current is zero) and therefore the transistor conducts for only half of each cycle of the signal waveform. This dramatically increases efficiency, compared with class A. Theoretically nearly 80% efficiency can be achieved with this bias and in practical circuits, efficiencies of 50% to 60% are possible.

The downside for this increased efficiency is that the transistor only amplifies half the waveform, therefore producing severe distortion. However, if the other half of the waveform can be obtained in some other way without too much distortion, then class B amplifiers can be used to drive most types of output device. The aim is to obtain a good power gain with as much of the energy consumed from the power supply going into the load as possible. This should be as consistent with reasonable linearity (lack of distortion), as possible. Power output stages do however produce more distortion than do voltage or current amplifiers.

class B has  Output devices conduct for 180 degrees (1/2 of input cycle) - for audio, two output devices in \"push-pull\" must be used

((((((((P=V_SI)))))))

By using the above formula and after conversion we can get the output power!!!!






in question it is mentioned that by manipulating V_cc OR V_in

_{we can proceed in the above way also!!!!!!!}