Patent ID: 7098838

Claim:
An amplified analog information reading device with linear decibel mode gain control, comprising: an adjustable gain amplification means for receiving said analog information and of which 2 j successive gain values, respectively adjustable by 2 j successive values of a first control word of j bits, follow a geometric progression of ratio a, an analog/digital conversion means, coupled to the output of the amplification means, having an adjustable input full scale of which 2 k different values, respectively adjustable, for each gain value, from 2 k successive values of a second control word of k bits, follow a geometric progression of ratio a 1/2 k , said conversion means for delivering a digital code corresponding to said analog information amplified by an overall gain, the value of which depends on the gain value of the amplifier and on that of said full scale, and control means for providing the first and second control words.