US 12,141,085 B2
Hybrid transmitter with calibration
Changkyo Lee, San Diego, CA (US); and Ashwin Sethuram, San Clemente, CA (US)
Assigned to QUALCOMM INCORPORATED, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Dec. 14, 2022, as Appl. No. 18/081,631.
Prior Publication US 2024/0202151 A1, Jun. 20, 2024
Int. Cl. G06F 13/38 (2006.01); H03K 17/687 (2006.01)
CPC G06F 13/38 (2013.01) [H03K 17/6871 (2013.01); G06F 2213/40 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A system, comprising:
a transmitter, wherein the transmitter comprises:
a pull-down circuit coupled between an output of the transmitter and a first rail, wherein the pull-down circuit has a signal input coupled to a first input of the transmitter;
a first pull-up circuit coupled between a second rail and the output of the transmitter, wherein the first pull-up circuit has a signal input coupled to a second input of the transmitter;
a second pull-up circuit coupled between the second rail and the output of the transmitter, wherein the second pull-up circuit has a signal input coupled to the first input of the transmitter; and
a control circuit coupled to a control input of the first pull-up circuit and a control input of the second pull-up circuit, wherein the control circuit is configured to:
output a first control signal to the control input of the first pull-up circuit, wherein the first control signal controls a drive strength of the first pull-up circuit, and
output a second control signal to the control input of the second pull-up circuit, wherein the second control signal controls a drive strength of the second pull-up circuit.