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Audio amplifier

  • US 4,483,016 A
  • Filed: 09/23/1982
  • Issued: 11/13/1984
  • Est. Priority Date: 09/23/1982
  • Status: Expired due to Fees
First Claim
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1. An audio amplifier circuit of the AB class including differential amplifier stage (16) having an input (17) for receiving and processing an input auido signal to provide a primary audio signal, a circuit transducer output (12), a primary amplification stage for receiving said primary audio signal and amplifying same to provide a transducer signal to said circuit transducer output (12), bipolar power supply connections (24, 26) for supplying electrical current, said AB class amplifier circuit characterized by said primary amplification stage including at least two MOS-FETS (metal oxide semiconductor-field-effect transistors) (32, 40) in common source connection between said power supply connections and said circuit transducer output (12) and a level-shifting driver stage (48, 50) for driving each MOS-FET.

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