Patent ID: 8330447
Filing Date: 2012-12-11
Classification: G01R

Abstract:
1. A self-balancing frequency determining bridge having one radio frequency input (RF IN ) and first and second outputs, wherein said first output has a voltage proportional to the magnitude of power of said RF IN , and said second output has a voltage proportional to the frequency of said RF IN , at least one differential voltage comparator, said differential voltage comparator having first and second inputs and a comparator output; first and second RF detectors, each having an input and an output, wherein said output of said first RF detector goes to said first input of said differential voltage comparator, and said output of said second RF detector goes to said second input of said differential voltage comparator; and first through fourth nodes, and first through fourth impedances; wherein said first node joins said RF wherein said second node joins said first impedance, said second impedance, and said input of said second RF detector; wherein said third node joins said third impedance, said fourth impedance, and said input of said first RF detector; wherein said fourth node connects said second impedance, said fourth impedance, and ground; wherein the output of said first RF detector is said first output, and the output of said second RF detector is said second output, and wherein said third and fourth impedances are tunable.