US 11,863,139 B2
Amplifier and receiving circuit, semiconductor apparatus, and semiconductor system using the same
Ji Hyo Kang, Seongnam-si Gyeonggi-do (KR)
Assigned to SK hynix Inc., Icheon-si Gyeonggi-do (KR)
Filed by SK hynix Inc., Icheon-si Gyeonggi-do (KR)
Filed on Dec. 7, 2021, as Appl. No. 17/544,478.
Application 17/544,478 is a continuation of application No. 16/560,700, filed on Sep. 4, 2019, granted, now 11,233,489.
Claims priority of application No. 10-2019-0018496 (KR), filed on Feb. 18, 2019.
Prior Publication US 2022/0094314 A1, Mar. 24, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H03F 3/45 (2006.01); H03G 3/30 (2006.01); H03G 1/00 (2006.01); H04L 25/03 (2006.01)
CPC H03F 3/4521 (2013.01) [H03G 1/0029 (2013.01); H03G 3/30 (2013.01); H03F 2203/45022 (2013.01); H04L 25/03057 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An amplifier comprising:
an amplification circuit configured to change voltage levels of a first amplification node and a second amplification node based on a first input signal and a second input signal;
an equalization circuit configured to couple a first equalization node to the second amplification node based on the voltage level of the first amplification node and configured to couple a second equalization node to the first amplification node based on the voltage level of the second amplification node;
a first gain adjusting circuit configured to couple the first and second equalization nodes based on a first gain control signal; and
a second gain adjusting circuit configured to change amounts of current flowing through the first and second equalization nodes based on a second gain control signal,
wherein the first gain adjusting circuit comprises a first resistor having one end coupled to the first equalization node, a second resistor having one end coupled to the second equalization node, and a source transistor configured to receive the first gain control signal to couple the other ends of the first and second resistors.