US 12,113,483 B2
DC coupled amplifier having pre-driver and bias control
Wayne Kennan, Lowell, MA (US); and Baotoan Nguyen, Lowell, MA (US)
Assigned to MACOM Technologies Solutions Holdings, Inc., Lowell, MA (US)
Filed by MACOM Technology Solutions Holdings, Inc., Lowell, MA (US)
Filed on Nov. 28, 2022, as Appl. No. 18/070,336.
Application 18/070,336 is a continuation of application No. 16/888,294, filed on May 29, 2020, granted, now 11,515,841.
Claims priority of provisional application 62/855,764, filed on May 31, 2019.
Prior Publication US 2023/0092922 A1, Mar. 23, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H03F 3/45 (2006.01); H03F 1/02 (2006.01); H03F 1/22 (2006.01); H03G 1/00 (2006.01)
CPC H03F 1/0233 (2013.01) [H03F 1/223 (2013.01); H03F 3/45085 (2013.01); H03F 2200/279 (2013.01); H03G 1/0023 (2013.01); H03G 1/0029 (2013.01); H03G 1/0088 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An amplifier system, comprising:
a pre-driver configured to receive one or more bias signals, from a bias circuit, and one or more input signals, and amplify the one or more input signals to create one or more pre-amplified signals;
an amplifier, the amplifier comprising a distributed amplifier having two or more amplifier sections, configured to receive and amplify the one or more pre-amplified signals to create one or more amplified signals, the amplifier further having an output driver termination element; and
the bias circuit, connected between the pre-driver and the amplifier, is configured to generate the one or more bias signals based on at least one bias circuit input current from the output driver termination element of the amplifier, such that the at least one bias circuit input current is provided to a level shifter circuit within the bias circuit which has a control voltage that is proportional to the at least one bias circuit input current based on a voltage divider resistor circuit which determines the control voltage of the level shifter circuit, wherein the pre-driver, bias circuit, and the amplifier are formed on a same die.