Patent ID: 7446605
Filing Date: 2008-11-04
Classification: H03F,H03G

Abstract:
1. An amplifier arrangement with controllable gain, comprising: a first amplifier device configured to amplify an input signal based on a gain factor thereof, comprising a first control input configured to receive a control signal to adjust the gain factor of the first amplifier device; a second amplifier device configured to amplify an input signal and provide such as an output signal, the second amplifier device comprising a second control input configured to receive the control signal to adjust a gain factor of the second amplifier device; and a control device operably coupled to the second amplifier device and configured to derive an effective gain factor of the second amplifier device as a function of the second amplifier device output signal and the control signal, and further comprising a control output coupled to the first and the second control input to provide the control signal as a function of a desired gain factor and the effective gain factor.