초록 ▼

An output power control system prevents saturation by limiting total output power and maintaining closed loop responsiveness for a radio telephone having closed loop and open loop gain control systems. The output power control system determines when total output power exceeds an output power trigger

An output power control system prevents saturation by limiting total output power and maintaining closed loop responsiveness for a radio telephone having closed loop and open loop gain control systems. The output power control system determines when total output power exceeds an output power trigger level and automatically enters a saturation prevention mode whereby total output power is reduced through modification of a closed loop power control register. In one embodiment, an output detector and an output comparator continuously monitor output power, and in another embodiment, an analog-to-digital converter samples output power levels. Saturation prevention processes of various preferred embodiments include, through continual monitoring, edge-triggered interrupt servicing, and level-triggered interrupt servicing, subsequently modifying the closed loop power control register to decrease the closed loop output power control portion of the total output power until the output power falls below the output trigger level. A saturation prevention method of yet another embodiment includes maintaining the closed loop power control register at a constant level unless a decrease in received signal strength is detected, in which case the closed loop power control register is modified to compensate for an increased open loop component of the total output power.

대표청구항 ▼

[ We claim: We claim:] [1.] An output power system for a radio communication device operable with a base station, said output power system comprising:an adjustable transmitter amplifier; anda controller connected to said adjustable transmitter amplifier to prevent closed loop power control saturatio

[ We claim: We claim:] [1.] An output power system for a radio communication device operable with a base station, said output power system comprising:an adjustable transmitter amplifier; anda controller connected to said adjustable transmitter amplifier to prevent closed loop power control saturation,wherein the closed loop power control saturation that would otherwise occur without said controller would include said adjustable transmitter amplifier being unable to respond within a defined period to base station commands to reduce power.