Invention Grant
US08810316B2 Method and apparatus for implementing a low noise amplifier with associated gain and input impedance
有权
用于实现具有相关增益和输入阻抗的低噪声放大器的方法和装置
- Patent Title: Method and apparatus for implementing a low noise amplifier with associated gain and input impedance
- Patent Title (中): 用于实现具有相关增益和输入阻抗的低噪声放大器的方法和装置
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Application No.: US13687589Application Date: 2012-11-28
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Publication No.: US08810316B2Publication Date: 2014-08-19
- Inventor: Shafiullah Syed , Joseph P. Heck
- Applicant: Motorola Solutions, Inc.
- Applicant Address: US IL Schaumburg
- Assignee: Motorola Solutions, Inc.
- Current Assignee: Motorola Solutions, Inc.
- Current Assignee Address: US IL Schaumburg
- Agent Steven A. May; Barbara R. Doutre
- Main IPC: H03F3/45
- IPC: H03F3/45 ; H03G3/30
Abstract:
An apparatus with associated gain and input impedance includes gain devices, a switching unit and a resistor. A first differential pair of gain devices and associated bias circuitry is configured to operate in a full gain mode. A second differential pair of gain devices is configured to operate in a reduced gain mode. The switching unit is configured to disable the first differential pair of gain devices and enable the second differential pair of gain devices in the reduced gain mode and to disable the second differential pair of gain devices and enable the first differential pair of gain devices in the full gain mode. The resistor is configured to maintain constant input impedance of the apparatus when in the reduced gain mode.
Public/Granted literature
- US20140145790A1 METHOD AND APPARATUS FOR IMPLEMENTING A LOW NOISE AMPLIFIER WITH ASSOCIATED GAIN AND INPUT IMPEDANCE Public/Granted day:2014-05-29
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