×

Power amplifier for a cellular telephone

  • US 5,175,871 A
  • Filed: 08/08/1991
  • Issued: 12/29/1992
  • Est. Priority Date: 08/08/1991
  • Status: Expired due to Term
First Claim
Patent Images

1. A power amplifier for a radio telephone transmitter operable in an analog mode, a relatively low power digital mode, and a relatively high power digital mode, comprising:

  • a non-linear stage for amplifying a radio frequency signal;

    a linear stage for amplifying the radio frequency signal, said linear stage being serially connectable to the output of said non-linear stage; and

    switching means for allowing the radio frequency signal to be applied only to the non-linear stage when the transmitter is operating in either the analog mode or the relatively low power digital mode in accordance with predetermined signals, and said switching means allowing the radio frequency signal to be applied to said non-linear stage and said linear stage when the transmitter is operating in the relatively high power digital mode in accordance with the predetermined signals.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×