US 12,348,204 B2
Driver amplifier
Luca Piazzon, Segrate (IT)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Apr. 8, 2022, as Appl. No. 17/716,829.
Application 17/716,829 is a continuation of application No. PCT/EP2019/077236, filed on Oct. 8, 2019.
Prior Publication US 2022/0231645 A1, Jul. 21, 2022
Int. Cl. H03F 3/45 (2006.01); H03F 1/32 (2006.01); H04B 10/58 (2013.01); H04B 10/54 (2013.01)
CPC H03F 3/45475 (2013.01) [H03F 1/3211 (2013.01); H04B 10/58 (2013.01); H03F 2203/45702 (2013.01); H04B 10/541 (2013.01); H04B 2210/254 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A driver amplifier circuit comprising:
a non-linear differential amplifier; and
a non-linear resistor connected across output terminals of the differential amplifier,
wherein the non-linear resistor has a resistance value that increases as an amplitude of a differential voltage across the non-linear resistor increases, and
wherein the non-linear resistor is configured to absorb a current that depends on the differential voltage according to a hyperbolic tangent function.