Patent ID: 8620249
Filing Date: 2013-12-31
Classification: H03D,H04B,H04L

Abstract:
1. A method for process, voltage, and temperature (PVT) measurement and calibration, the method comprising: detecting a nominal DC offset current in a radio frequency (RF) receiver, wherein said nominal DC offset current is generated at a nominal operating temperature by an injection circuit in a first operating mode and is based on a calibration voltage, wherein the injection circuit comprises current drivers and switches, and wherein each output of each switch is coupled to an input of each current driver; determining a nominal transconductance parameter based on said detected nominal DC offset current and said calibration voltage; storing said determined nominal transconductance parameter; selecting a polarity for said nominal DC offset current based on a polarity selection signal; and generating, by the injection circuit in a second operating mode, an injection DC offset current equal to the product of the nominal transconductance parameter and a square of an out gut voltage of a low-noise amplifier coupled to the injection circuit, the injection DC offset current being generated based on a plurality of current driver control signals, wherein the nominal transconductance parameter is based on an output of the injection circuit.