×

Transceiver

  • US 6,397,044 B1
  • Filed: 12/17/1999
  • Issued: 05/28/2002
  • Est. Priority Date: 12/18/1998
  • Status: Expired due to Fees
First Claim
Patent Images

1. A transceiver for a portable radio communication apparatus comprising a receiver for receiving a signal at a received frequency and including a local oscillator used in down conversion of the received frequency, a transmitter being operable to transmit at a transmission frequency, said transmission frequency being offset from, and aligned to, the received frequency by a predetermined frequency spacing, the transmitter including a mixer having a first port for inputting said transmission frequency signal and a second port for inputting the local oscillator signal, and comprising means for rectifying the input local oscillator signal to provide a conductance waveform at a multiple of the local oscillator signal and means for mixing said transmission frequency signal with the conductance waveform at said multiple of the local oscillator signal frequency for down-converting the transmission frequency signal to an intermediate transmitter frequency signal.

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