Battery life extending technique for mobile wireless applications
First Claim
1. A mobile wireless device comprising:
- an amplifier connected to receive an input signal to be transmitted, said amplifier having a power supply input terminal and an amplfier output terminal;
a controllable voltage regulator having a battery input terminal and a voltage control terminal, said regulator having an output voltage terminal connected to said power supply input terminal of said amplifier;
a receive portion that receives a signal from another transmitting device and generates a signal strength indication signal indicative of the strength of said signal received from said another transmitting device; and
a controller having an output connected to said control terminal of said regulator and a controller input terminal connected to receive a signal related to said signal strength indication signal to cause an average power output of said amplifier to be related to said signal strength indication signal, said controller also controlling a bias level of one or more components in said amplifier based on said strength of said signal from said another transmitting device.
2 Assignments
0 Petitions
Accused Products
Abstract
An operating voltage applied to a transmitter'"'"'s power amplifier in a mobile wireless transceiver is dynamically controlled so as to improve the efficiency of the transmitter at all output power levels. In one embodiment, the bias current levels within the transmitter are also varied to optimize the efficiency of the transmitter at all output power levels. In a preferred embodiment, a highly efficient switching regulator is controlled by a control circuit to adjust the operating voltage and/or bias current for the power amplifier in the transmitter. The control circuit has as its input any of a variety of signals which reflect the actual output power of the transmitter, the desired output power, or the output voltage swing of the transmitter.
130 Citations
68 Claims
-
1. A mobile wireless device comprising:
-
an amplifier connected to receive an input signal to be transmitted, said amplifier having a power supply input terminal and an amplfier output terminal; a controllable voltage regulator having a battery input terminal and a voltage control terminal, said regulator having an output voltage terminal connected to said power supply input terminal of said amplifier; a receive portion that receives a signal from another transmitting device and generates a signal strength indication signal indicative of the strength of said signal received from said another transmitting device; and a controller having an output connected to said control terminal of said regulator and a controller input terminal connected to receive a signal related to said signal strength indication signal to cause an average power output of said amplifier to be related to said signal strength indication signal, said controller also controlling a bias level of one or more components in said amplifier based on said strength of said signal from said another transmitting device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A method for controlling a wireless device comprising:
-
amplifying a signal for transmission; receiving a signal from another transmitting device; generating a signal strength indication signal indicative of the strength of said signal received from said another transmitting device; generating a control signal based upon said signal strength indication signal; controlling a voltage output of a voltage regulator by said control signal, said regulator providing voltage to said amplifier, such that an average power output of said amplifier is related to said signal strength indication signal; and controlling a bias level of one or more components in said amplifier based on said strength of said signal from said another transmitting device. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
-
-
33. A mobile wireless device comprising:
-
an amplifier connected to receive an input signal to be transmitted, said amplifier having a power supply input terminal and an amplifier output terminal; a controllable voltage regulator having a battery input terminal and a voltage control terminal, said regulator having an output voltage terminal connected to said power supply input terminal of said amplifier; and a controller having an output connected to said control terminal of said regulator and a controller input terminal connected to receive a signal related to an output level of said amplifier, said controller also controlling a bias level of one or more components in said amplifier based on said signal related to said output level of said amplifier. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54)
-
-
55. A method for controlling a wireless device comprising:
-
amplifying a signal for transmission using an amplifier; generating a control signal based upon a signal related to an output level of said amplifier; controlling a voltage output of a voltage regulator by said control signal, said regulator providing voltage to operate said amplifier; and controlling a bias level of one or more components in said amplifier based upon said signal related to said output level of said amplifier. - View Dependent Claims (56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68)
-
Specification