×

Apparatus and methods for output buffer circuitry with constant output power in radio-frequency circuitry

  • US 7,138,858 B2
  • Filed: 02/19/2002
  • Issued: 11/21/2006
  • Est. Priority Date: 01/12/2001
  • Status: Expired due to Fees
First Claim
Patent Images

1. A buffer circuitry for buffering a radio-frequency (RF) signal, comprising:

  • a complementary pair of switches having an input terminal and output terminal, the input terminal of the complementary pair of switches configured to respond to the radio-frequency signal, the output terminal of the complementary pair of switches coupled to an output of the buffer circuitry; and

    a power source, including a capacitor coupled to a current source, the power source coupled to the complementary pair of switches, the power source configured to supply power to the complementary pair of switches such that the buffer circuitry supplies a substantially constant power level at its output, wherein the input terminal of the complementary pair of switches receives the radio-frequency signal from a phase-lock loop circuitry coupled to the complementary pair of switches.

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