US 12,273,082 B2
Isolated amplifiers with reconfigurable filter
Maciej Jankowski, Munich (DE); and Roland Bucksch, Buch am Erlbach (DE)
Assigned to Texas Instruments Incorporated, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Jul. 19, 2022, as Appl. No. 17/868,072.
Prior Publication US 2024/0030880 A1, Jan. 25, 2024
Int. Cl. H03F 3/45 (2006.01); H03F 1/30 (2006.01)
CPC H03F 3/45645 (2013.01) [H03F 1/301 (2013.01); H03F 2203/45526 (2013.01)] 20 Claims
OG exemplary drawing
 
1. First and second inputs adapted to receive an input signal;
a fully differential amplifier (FDA) having an inverting input, a non-inverting input, an inverting output and a non-inverting output, the inverting input coupled to the first input and the non-inverting input coupled to the second input;
a first reconfigurable resistance-capacitance (RC) network coupled to the non-inverting output;
a second reconfigurable RC network selectively couplable to the inverting output; and
a variable resistor coupled between the second input and ground, a resistance of the variable resistor being set based on a selected mode of operation;
wherein the reconfigurable filter is configurable to enable operation in any of multiple modes including a single-ended mode of operation and a differential mode of operation.