Source: http://www.google.com/patents/US6228079?dq=5,579,517
Timestamp: 2014-11-26 07:56:57
Document Index: 233677924

Matched Legal Cases: ['Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 09', 'application No. 09', 'application No. 09', 'Application No. 41', 'Application No. 41']

Patent US6228079 - Method and apparatus for power measurement in radio frequency electro ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsIn an embodiment of the invention an apparatus for power measurement in an electro-surgical instrument is disclosed. The apparatus includes: sensors, a first summer and differencer, a peak detector, a second summer and differencer, and a multiplier. The sensors produce a voltage signal and a current...http://www.google.com/patents/US6228079?utm_source=gb-gplus-sharePatent US6228079 - Method and apparatus for power measurement in radio frequency electro-surgical generatorsAdvanced Patent SearchPublication numberUS6228079 B1Publication typeGrantApplication numberUS 09/167,505Publication dateMay 8, 2001Filing dateOct 6, 1998Priority dateOct 6, 1997Fee statusLapsedAlso published asUS6139546, US6165173, US6231569, US6293941, US6309386, WO1999017672A1Publication number09167505, 167505, US 6228079 B1, US 6228079B1, US-B1-6228079, US6228079 B1, US6228079B1InventorsFranklin R. KoenigOriginal AssigneeSomnus Medical Technology, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (7), Referenced by (17), Classifications (25), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetMethod and apparatus for power measurement in radio frequency electro-surgical generatorsUS 6228079 B1Abstract In an embodiment of the invention an apparatus for power measurement in an electro-surgical instrument is disclosed. The apparatus includes: sensors, a first summer and differencer, a peak detector, a second summer and differencer, and a multiplier. The sensors produce a voltage signal and a current signal proportional to a voltage and a current delivered by the first channel to the surgical site. The first summer and differencer sum the voltage signal together with the current signal to produce a first signal and difference the voltage signal with the current signal to produce a second signal. The peak detector couples to the first summer and differencer to form a third and a fourth signal proportional respectively to peak voltage levels in the first and the second signals. The second summer and differencer produce a fifth signal and a sixth signal proportional respectively to a difference and a sum of the third signal and the fourth signal. The multiplier multiplies the fifth and the sixth signals to produce a power signal equivalent to the actual power delivered by the first channel to the surgical site.
CROSS REFERENCE TO RELATED APPLICATION This application claims the benefit of prior filed Provisional Application No. 60/062,543, filed on Oct. 6, 1997, entitled Method And Apparatus For Power Measurement In Radio Frequency Electro-Surgical Generator, Provisional Application No. 60/062,458, filed on Oct. 6, 1997, entitled Linear Power Control With Digital Phase Lock, Provisional Application, Provisional No. 60/061,193, filed on Oct. 6, 1997, entitled Linear Power Control With PSK Regulation, Provisional Application No. 60/061,197, filed on Oct. 6, 1997, entitled Memory for Regulating Device Utilization and Behavior, Provisional Application No. 60/061,714, filed on Oct. 6, 1997, entitled Dual Processor Architecture For Electro Generator, and Provisional Application No. 60/061,213, filed on Oct. 6, 1997, entitled Method And Apparatus for Impedance Measurement In A Multi-Channel Electro-Surgical Generator. The present application is related to U.S. patent Application No. 09/167,217, filed Oct. 6, 1998, entitled Linear Power Control With Digital Phase Lock, U.S. patent application No. 09/167,412, filed Oct. 6, 1998, entitled Liner Power Control With PSK Regulation, U.S. patent application No. 09/167,222, filed Oct. 6, 1998, entitled Memory for Regulating Device Utilization and Behavior, U.S. patent application Ser. No. 09/167,508, filed Oct. 6, 1998, entitled Dual Processor Architecture For Electro Generator, U.S. patent application Ser. No. 09/167,215, filed Oct. 6, 1998, entitled Method And Apparatus for Impedance Measurement In A Multi-Channel Electro-Surgical Generator, International Application No. 41/821,065, filed Oct. 6, 1998, entitled Linear Power Control With Digital Phase Lock, and International Application No. 41/821,066, filed October 1998, entitled Dual Processor Architecture For Electro Generator. Each of the above-cited applications is incorporated herein by reference in its entirety.
SUMMARY OF THE INVENTION A method and apparatus for power measurement and radio frequency waveform synthesis in electro-surgical generators is disclosed.
DETAILED DESCRIPTION FIG. 1 shows the apparatus for a typical embodiment of the RF electro-surgical device. The system comprises an RF power supply 100 with a user input and display panel 102, a foot switch 104, a surgical handset 106 with a surgical probe 108 and an electrical grounding pad 110.
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