Invention Grant
- Patent Title: RF power sensor with chopping amplifier
- Patent Title (中): 射频功率传感器与斩波放大器
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Application No.: US11744739Application Date: 2007-05-04
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Publication No.: US07652464B2Publication Date: 2010-01-26
- Inventor: David Lang , Noel Lopez
- Applicant: David Lang , Noel Lopez
- Applicant Address: US CA Carlsbad
- Assignee: ViaSat, Inc.
- Current Assignee: ViaSat, Inc.
- Current Assignee Address: US CA Carlsbad
- Agency: Snell & Wilmer, LLP
- Main IPC: G01R25/02
- IPC: G01R25/02

Abstract:
An RF power detector having a wide dynamic range may comprise a chopping amplifier and is configured to detect pulsed high frequency RF signals. The chopping amplifier controlled by a bias current regulator amplifies and chops an RF signal by periodically enabling and disabling the amplifier according to a system clock. The chopped high frequency RF signal feeds a Schottky diode biased to operate in the square law region for weak signals. The Schottky diode voltage is tapped and high pass filtered. The voltage drives a logarithmic and linear converter. The converter outputs are summed to produce an output voltage that is a repeatable and stable monotonically increasing function of the RF power.
Public/Granted literature
- US20080012644A1 RF POWER SENSOR WITH CHOPPING AMPLIFIER Public/Granted day:2008-01-17
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