# US 2014/0152295 A1 · Logarithmic mean-square power detector

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- Number: US 2014/0152295 A1
- Document ID: US20140152295A1
- Status: Published application
- Kind: A1
- Application number: 14/077,855
- Filed: 2013-11-12
- Published: 2014-06-05
- Earliest claimed: 2009-11-23
- Assignees: Hittite Microwave Corporation
- Applicants: Hittite Microwave Corporation
- Inventors: Yalcin Alper Eken; Peter John Katzin
- Web page: https://patentgrep.com/patent/US20140152295A1

## CPC

- G01R 21/12: in circuits having distributed constants
- G01R 15/09: Autoranging circuits
- H03G 3/3036: {in high-frequency amplifiers or in frequency-changers (H03G3/3052, H03G3/32, H03G3/34 take precedence)}
- H03G 7/001: {without controlling loop (H03G7/007, H03G7/02, H03G7/06 take precedence)}
- G01R 19/02: Measuring effective values, i.e. root-mean-square values
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- H03G: CONTROL OF AMPLIFICATION

## Abstract

A mean square power detector in accordance with one or more embodiments includes a gain or attenuation circuit comprising a plurality of gain or attenuation elements arranged for generating a plurality of amplified or attenuated versions of a radio frequency (RF) input signal. The mean square power detector also includes a plurality of mean square detectors coupled to the gain or attenuation circuit. Each of the mean square detectors receives a different one of the plurality of amplified or attenuated versions of the RF input signal. Each of the plurality of mean square detectors generates an output signal representative of the mean square power of the RF input signal for a different input signal level range. A summing element is coupled to the plurality of mean square detectors for combining the output signals of the plurality of mean square detectors to generate a signal representative of the mean square or root mean square of the RF input signal.

## Claims

### Claim 1

A mean square power detector, comprising:
a gain or attenuation circuit comprising a plurality of gain or attenuation elements arranged for generating a plurality of amplified or attenuated versions of a radio frequency (RF) input signal;
a plurality of mean square detectors coupled to the gain or attenuation circuit, each of the mean square detectors receiving a different one of the plurality of amplified or attenuated versions of the RF input signal, each of said plurality of mean square detectors generating an output signal representative of the mean square power of the RF input signal for a different input signal level range; and
a summing element coupled to the plurality of mean square detectors for combining the output signals of the plurality of mean square detectors to generate a signal representative of the mean square or root mean square of the RF input signal.