US 11,843,361 B2
LO leakage suppression in frequency conversion circuits
Arun Paidimarri, White Plains, NY (US); Bodhisatwa Sadhu, Peekskill, NY (US); and Wooram Lee, Briarcliff Manor, NY (US)
Assigned to International Business Machines Corporation, Armonk, NY (US)
Filed by International Business Machines Corporation, Armonk, NY (US)
Filed on Oct. 14, 2021, as Appl. No. 17/501,088.
Claims priority of provisional application 63/137,917, filed on Jan. 15, 2021.
Prior Publication US 2022/0231668 A1, Jul. 21, 2022
Int. Cl. H03H 11/32 (2006.01); H03D 7/14 (2006.01); H03B 5/12 (2006.01)
CPC H03H 11/32 (2013.01) [H03B 5/1209 (2013.01); H03B 5/1228 (2013.01); H03D 7/1441 (2013.01); H03D 2200/009 (2013.01); H03D 2200/0023 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A frequency conversion circuit configured to suppress a local oscillator (LO) leakage signal having a first leakage basis vector and a second leakage basis vector, the frequency conversion circuit comprising:
a first actuator electrically coupled to a differential signal input associated with a transconductance stage of the frequency conversion circuit, wherein the first actuator is configured to adjust a first basis vector associated with a differential output of the transconductance stage to, at least partially, offset the first leakage basis vector of the LO leakage signal; and
a second actuator electrically coupled to the differential current output of the transconductance stage and electrically coupled to a set of commutating devices of the frequency conversion circuit, the commutating devices configured to receive differential LO inputs, wherein the second actuator is configured to adjust a second basis vector associated with a differential impedance of the set of commutating devices to, at least partially, offset the second leakage basis vector of the LO leakage signal.