US 9,813,030 B1
Wideband single-ended IM3 distortion nulling
Wais M. Ali, Irvine, CA (US); and Lloyd F. Linder, Agoura Hills, CA (US)
Filed by Wais M. Ali, Irvine, CA (US); and Lloyd F. Linder, Agoura Hills, CA (US)
Filed on Jul. 1, 2016, as Appl. No. 15/201,206.
Int. Cl. H03F 1/22 (2006.01); H03F 1/32 (2006.01); H03F 3/195 (2006.01); H03F 1/26 (2006.01)
CPC H03F 1/3205 (2013.01) [H03F 1/26 (2013.01); H03F 3/195 (2013.01); H03F 2200/411 (2013.01); H03F 2200/451 (2013.01); H03F 2201/3212 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An integrated circuit comprising:
a main amplifier circuit having a single-ended signal input and a single-ended signal output with a signal path existing there between, the main amplifier circuit including a first transistor and a second transistor arranged in a two-stage common gate or two-stage common base architecture with the single-ended signal input coupled to a source or an emitter of the first transistor, and a drain or a collector of the first transistor coupled to a source or an emitter of the second transistor at a common point; and
a correction circuit coupled to the main amplifier circuit, the correction circuit including an auxiliary transistor having a gate or a base coupled to the single-ended signal input of the main amplifier circuit and a drain or a collector coupled to the signal path at the common point to reduce intermodulation products generated by the main amplifier circuit.