US Patent 7821273 Circuit for detecting the impedance of a load

Patent 7821273 was granted and assigned to Epcos Ag on October, 2010 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Epcos Ag

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

78212730

Patent Inventor Names

Christophe Chanlo0

Adrianus Van Bezooijen0

Date of Patent

October 26, 2010

Patent Application Number

115753070

Date Filed

September 9, 2005

Patent Primary Examiner

‌

Timothy J. Dole

Patent abstract

The invention refers to a circuit and a method for detecting the impedance of a load, whereby the circuit and the method can be used by an impedance matching circuit. Impedance matching circuits need a complex algorithm to adjust the impedance accordingly. This algorithm renders the response time to be long. It has been found out that the complexity partially stems from the fact that the phase of the reflection coefficient is not known over the full range of 0° to 360°. A quadrature phase detector is used to provide the full phase information.