US 12,244,329 B2
Split input amplifier for protection from DC offset
Hongrui Wang, San Jose, CA (US); Abbas Komijani, Mountain View, CA (US); and Xinhua Chen, San Diego, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Oct. 10, 2023, as Appl. No. 18/484,265.
Application 18/484,265 is a continuation of application No. 17/950,053, filed on Sep. 21, 2022, granted, now 12,009,847.
Application 17/950,053 is a continuation of application No. 17/690,867, filed on Mar. 9, 2022, granted, now 11,894,866.
Prior Publication US 2024/0039564 A1, Feb. 1, 2024
Int. Cl. H04B 1/04 (2006.01)
CPC H04B 1/04 (2013.01) [H04B 2001/0408 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electronic device comprising:
a receiver comprising a first unit gain buffer configured to receive a reference voltage signal;
a transmitter comprising
a second unit gain buffer coupled to the first unit gain buffer of the receiver,
an amplifier comprising
an input resistor,
a feedback resistor,
a first positive input configured to receive the reference voltage signal via the first unit gain buffer and the second unit gain buffer, and
a negative input coupled to the input resistor and the feedback resistor, and
a connector coupling the first unit gain buffer of the receiver to the second unit gain buffer of the transmitter.