Patent ID: 11936346
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. The amplifier circuit of claim 5, further comprising:
a first variable feedback circuit comprising:
a variable resistor coupled to the input of the first attenuation circuit;
a first switch coupled between the variable resistor and the output of the first amplifier; and
a second switch coupled between the variable resistor and a ground level; and

a second variable feedback circuit comprising:
a variable resistor coupled to the input of the second attenuation circuit;
a first switch coupled between the variable resistor and the output of the second amplifier; and
a second switch coupled between the variable resistor and a ground level;

wherein the control logic is further adapted to close the first switches and open the second switches in the first and second variable feedback circuits when selecting a first output gain for the first and second amplifiers, and to open the first switches and close the second switches in the first and second variable feedback circuits when selecting a second output gain, lower than the first output gain, for the first and second amplifiers.