Patent ID: 8045944
Filing Date: 2011-10-25
Classification: H03D

Abstract:
1. A method for calibrating a mixer, the method comprising: (a) setting a calibration mechanism to receive on a channel near a center of a frequency band of interest; (b) setting a first control signal to a first minimum range value; (c) setting a second control signal to a second minimum range value; (d) receiving an input signal comprising two frequency tones; (e) measuring a first absolute power value of a tone present at a frequency difference between the two frequency tones of the input signal; (f) associating the measured first absolute power value with the first control signal value; (g) storing the measured first absolute power value associated with the first control signal value in memory; (h) determining if the first control signal equals a first maximum value; (i) incrementing the first control signal by its steps size if the first control signal does not equal the first maximum value and repeating steps (e) through (h); (j) determining which of the measured first absolute power values stored in memory possesses a first characteristic, if the first control signal equals the first maximum value; (k) identifying the first control signal value associated with the determined measured first absolute power value stored in memory possessing the first characteristic as a best first control signal value; (l) setting the first control signal value to the best first control signal value; (m) measuring a second absolute power value of a tone present at the frequency difference between the two frequency tones of the input signal; (n) associating the measured second power value with the second control signal value; (o) storing the measured second absolute power value associated with the second control signal value in memory; (p) determining if the second control signal equals a second maximum value; (q) incrementing the second control signal by its steps size if the second control signal does not equal the second maximum value and repeating steps (m) through (p); (r) determining which of the measured second absolute power values stored in memory possesses a second characteristic, if the second control signal equals the second maximum value; (s) identifying the second control signal value associated with the determined measured second absolute power value stored in memory possessing the second characteristic as a best second control signal value; and (t) setting the second control signal value to the best second control signal value.