Method and system for level detector calibration for accurate transmit power control
First Claim
1. A method for controlling a circuit within a transmitter, the method comprising:
- canceling a zero input offset voltage from an output of a level detector;
calibrating transmitter output signal strength over a range of input voltage values utilizing a known temperature-and-supply-voltage-independent voltage level by an on-chip voltage-controlled oscillator signal generator and the level detector by comparing a signal generated by said on-chip voltage-controlled oscillator signal generator to a signal received from an amplifier in the transmitter;
generating a corrected transfer function to control transmit power, wherein the corrected transfer function characterizes non-linearity in voltage measured by the level detector versus the signal received from the amplifier; and
utilizing the corrected transfer function to set output transmit power of the transmitter.
4 Assignments
0 Petitions
Accused Products
Abstract
Methods and systems for level detector calibration are disclosed and may comprise calibrating a level detector integrated on-chip to eliminate an associated zero input offset voltage utilizing a replica bias circuit with no input ac voltage at the level detector or the replica bias circuit. The offset voltages of the level detector and the replica bias circuit may be combined to eliminate the associated zero input offset voltage of the level detector. The output signal may be generated by a difference of output signals from the level detector and the replica bias circuit. The level detector and the replica bias circuit may be biased utilizing a similar bias voltage. A plurality of known input voltages may be utilized to generate a corresponding plurality of output voltages of the level detector, generating a corrected transfer function that may be used to accurately set a transmitter power level.
34 Citations
20 Claims
-
1. A method for controlling a circuit within a transmitter, the method comprising:
-
canceling a zero input offset voltage from an output of a level detector; calibrating transmitter output signal strength over a range of input voltage values utilizing a known temperature-and-supply-voltage-independent voltage level by an on-chip voltage-controlled oscillator signal generator and the level detector by comparing a signal generated by said on-chip voltage-controlled oscillator signal generator to a signal received from an amplifier in the transmitter; generating a corrected transfer function to control transmit power, wherein the corrected transfer function characterizes non-linearity in voltage measured by the level detector versus the signal received from the amplifier; and utilizing the corrected transfer function to set output transmit power of the transmitter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A system for controlling a circuit within a transmitter, the system comprising:
-
one or more circuits operable to cancel a zero input offset voltage from an output of a level detector; one or more circuits operable to calibrate transmitter output signal strength over a range of input voltage values utilizing a known temperature-and-supply-voltage-independent voltage level by an on-chip voltage-controlled oscillator signal generator and the level detector by comparing a signal generated by said on-chip voltage-controlled oscillator signal generator to a signal received from an amplifier in the transmitter; one or more circuits operable to generate a corrected transfer function to control transmit power, wherein the corrected transfer function characterizes non-linearity in voltage measured by the level detector versus the signal received from the amplifier; and one or more circuits operable to utilize the corrected transfer function to set output transmit power of the transmitter. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. A non-transitory computer readable medium embodied with computer executable instructions, which when executed by a computer, causes the computer to:
-
communicate a null signal as an input to a level detector; determine a zero input offset voltage associated with the level detector based on the null signal; cancel the zero input offset voltage from an output of the level detector; calibrate transmitter output signal strength over a range of input voltage values utilizing a known temperature-and-supply-voltage-independent voltage level by an on-chip voltage-controlled oscillator signal generator and the level detector by comparing a signal generated by said on-chip voltage-controlled oscillator signal generator to a signal received from an amplifier in the transmitter; generate a corrected transfer function to control transmit power, wherein the corrected transfer function characterizes non-linearity in voltage measured by the level detector versus the signal received from the amplifier; and utilize the corrected transfer function to set output transmit power of the transmitter. - View Dependent Claims (20)
-
Specification