Systems and methods for measuring the frequency of signals generated by high frequency medical devices

摘要

Systems and corresponding methods for determining characteristics of an output signal generated by a high-frequency medical device using low-frequency measurement systems are disclosed. A digital measurement system includes an oscillator, a mixer, and a controller coupled to each other. The oscillator provides a reference signal having a second frequency. The mixer generates a down-converted signal based on the output signal and the reference signal. The controller then determines a characteristic of the output signal (e.g., frequency or phase) based on the down-converted signal. An analog measurement system includes a filter having a center frequency, a rectifier, and a controller. The filter filters the output signal and the rectifier rectifies the filtered signal. The controller samples the rectified signal and determines a characteristic of the output signal based on the level of the rectified signal. The reference signal controller may adjust a characteristic of the output signal based on the determined frequency and/or phase of the output signal.

主权项

1. A system for measuring a characteristic of an output signal generated by a generator, the output signal having a first frequency, the system comprising:
an oscillator configured to provide a reference signal having a second frequency; a first mixer configured to generate a first down-converted signal based on the output signal and the reference signal; an amplifier configured to amplify the output signal; a second mixer configured to generate a second, down-converted signal based on the amplified output signal and the reference signal; and a controller configured to:
operate at a clock frequency lower than the first frequency;determine a frequency of the output signal based on the first down-converted signal; anddetermine a phase of the amplified output signal based on the second, down-converted signal.