Patent ID: 8324969

Claim:
A variable gain amplifier device with improved gain resolution, the device comprising: a programmable gain amplifier operable to receive an analog input signal and to amplify the analog input signal to thereby generate an analog output signal, the programmable gain amplifier comprising: an amplifier; and a switchable resistor network; an analog-to-digital converter communicatively coupled to the programmable gain amplifier and operable to convert the analog output signal to a digital signal; an automatic level control algorithm means communicatively coupled to the analog-to-digital converter and operable to generate a control code by processing the digital signal; and a delta-sigma modulator communicatively coupled to the automatic level control algorithm means and operable to generate a pulse-density modulated signal by processing the control code wherein the pulse-density modulated signal is fed back to the programmable gain amplifier to control the switchable resistor network.