Patent ID: 6472935
Filing Date: 2002-10-29
Classification: H03F,H03G

Abstract:
A combining network device suitable for use in a switchable path power amplifier including a first combining network device input coupled to a first power device, a second combining network device input coupled to a second power device, and a single combining network device output coupled to a power amplifier output wherein,a. said first power device is a high power amplifier; b. said second power device is a low power amplifier; c. said combining network device being operable to couple either said first power device or said second power device to said power amplifier output such that only an enabled power device drives said power amplifier output; b. said combining network device being operable to decouple a disabled power device from said power amplifier output such that any effect of said disabled power device upon an amplified electrical signal generated by said enabled power device is negligible; and d. said combining network device being operable to transform output impedance at said power amplifier output into a proper output impedance required for proper operation of said enabled power device.