US 12,255,593 B2
Transimpedance amplifier
Christopher John Born, Bristol (GB); Matthew George Hagman, Gatineau (CA); and Darrell Iaian Smith, Herfordshire (GB)
Assigned to Semtech Corporation, Camarillo, CA (US)
Filed by Semtech Corporation, Camarillo, CA (US)
Filed on Jan. 25, 2022, as Appl. No. 17/648,897.
Prior Publication US 2023/0238930 A1, Jul. 27, 2023
Int. Cl. H03F 3/08 (2006.01); H03F 3/45 (2006.01); H03G 3/30 (2006.01); H04B 10/67 (2013.01); H03F 1/34 (2006.01); H03F 1/56 (2006.01)
CPC H03F 3/45475 (2013.01) [H03G 3/3036 (2013.01); H04B 10/673 (2013.01); H03F 1/34 (2013.01); H03F 1/56 (2013.01); H03F 2200/372 (2013.01); H03G 2201/103 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A transimpedance amplifier (TIA) for converting an input current at an input node into an output voltage at an output node, the TIA comprising:
a first amplifier stage having a first input coupled to the input node and a first output;
a feedback path between the first output and the first input;
a second amplifier stage in the feedback path having a second input, the second input coupled to the first output of the first amplifier stage;
a feedback resistor in the feedback path coupled between an output of the second amplifier stage and first input of the first amplifier stage; and
an output stage, comprising:
a load resistor coupled between a reference voltage node and a T-coil, the T-coil comprising first and second inductors coupled in series at an inductor node, the T-coil coupled between the first output and the load resistor, the inductor node coupled to the output node of the TIA.