Help to design and build a transformer coupled audio amplifier. I need to design

Question

Help to design and build a transformer coupled audio amplifier. I need to design and build a transformer coupled audio amplifier/ fully biased using A power amplifier MOSFET and transformer with this below specification. Power Output : 1Watt into 8 ohms, RMS continuous Frequency Response: 100Hz to 15kHz (you can probably do better) Total Harmonic Distortion (THD): <2% at half power, 1000Hz S/N Ratio: >70 dBA Gain: Appropriate for line level signal source (about 30dB) Input Impedance: > 5k Ohm (but can easily be made much higher) 2) Plug in the wall amplifier. You will need to build a power supply section. In this case the specs are all the same except the THD will be required to be <1% (it

Explanation / Answer

follow this You will be required to simulate your design in SPICE. Most of the electronics will have SPICE models available. Transformer models are another matter. There are some nice non-linear models available but you can also just use a ideal transformer for the built-in SPICE libraries. This will likely predict lower THD than your real circuit can achieve. BUY A DUMMY LOAD RESISTOR! A resistor rated for a few watts will do. You’ll need it for routine testing. We won’t provide a loudspeaker until near the final test time. The boring stuff: 1. The project is to be packaged in a metal or plastic enclosure with appropriate switches, controls, connectors, power cords, etc. properly mounted on the enclosure. Enclosures should be “Bud mini-box” or equivalent type enclosures available from the EE stockroom. The whole thing should be reasonable sized (6” on a side or less), if you feel you need to make a bigger board/box, please consult your TA first. 2. Components should be available from Digi-Key (they have the quickest delivery), Mouser Electronics (they are not quite as quick to ship as Digi-Key), or standard items from the EE stockroom.* These parts will be ordered through the ECE Depot. A single IC containing the entire project is not permitted. If you wish to incorporate other parts from other suppliers you will be responsible for ordering and paying for them – we will not reimburse groups for these out of pocket expenses. *Once groups are assigned, your TA will assign you a section and group number (the section is the number of your section according to the University class schedule). When you go to the ECE depot to order parts, you need to tell them that you are ordering parts for EE3102 and provide your name, your section number and your group number e.g.: “I’m Bob Smith, I’m ordering parts for EE3102, Section 5, group 2.” When the parts are ready for pick up, they will be in a paper sack identified by section and group number. CAUTION: not all parts listed in the supplier catalog are in stock, and ordering out of stock parts may result in substantial delays. Many parts are also surface mount – surface mount parts are often quite small and difficult to solder – if leaded parts (packages with leads like the ones you can plug into a proto-board) are available, they are usually the best choice. 3. The total cost of all parts ordered through the ECE depot should not exceed $50. * As mentioned above, the transformers will be handled differently.

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