US 11,689,188 B2
Signal output circuit and method
Kuan-Hao Tseng, Hsinchu (TW); Ka-Un Chan, Hsinchu (TW); and Po-Chih Wang, Hsinchu (TW)
Assigned to REALTEK SEMICONDUCTOR CORPORATION, Hsinchu (TW)
Filed by REALTEK SEMICONDUCTOR CORPORATION, Hsinchu (TW)
Filed on Apr. 29, 2021, as Appl. No. 17/244,073.
Claims priority of application No. 109114901 (TW), filed on May 5, 2020.
Prior Publication US 2021/0351764 A1, Nov. 11, 2021
Int. Cl. H03K 5/1252 (2006.01); H04B 1/04 (2006.01); H03H 11/12 (2006.01)
CPC H03H 11/12 (2013.01) [H03K 5/1252 (2013.01); H04B 1/0475 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A circuit having anti-interference mechanism, comprising:
an amplifier electrically coupled to a power supply through a first amplifier bond wire and to a ground terminal through a second amplifier bond wire, and configured to operate according to the power supply and generate an amplified output signal;
a transformer circuit comprising a transformer configured to perform impedance transformation on the amplified output signal to generate a transformed output signal, and a voltage-stabilizing capacitor configured to suppress second-order harmonics of the amplifier; and
a power-terminal side anti-interference circuit comprising:
a power-terminal side bond wire electrically coupled to the ground terminal; and
a power-terminal side anti-interference capacitor electrically coupled between the power-terminal side bond wire and the first amplifier bond wire, to operate together with the power-terminal side bond wire, so as to filter out a first-order harmonics coupling signal coupled to the first amplifier bond wire by the transformed output signal generated by the transformer circuit.