US 12,081,173 B2
Complementary envelope detector
Marcus Granger-Jones, Scotts Valley, CA (US); and Nadim Khlat, Cugnaux (FR)
Assigned to Qorvo US, Inc., Greensboro, NC (US)
Filed by Qorvo US, Inc., Greensboro, NC (US)
Filed on Jun. 30, 2021, as Appl. No. 17/363,568.
Claims priority of provisional application 63/157,085, filed on Mar. 5, 2021.
Prior Publication US 2022/0286094 A1, Sep. 8, 2022
Int. Cl. H03F 3/45 (2006.01); H03F 1/02 (2006.01); H03F 3/24 (2006.01); H04B 1/40 (2015.01)
CPC H03F 1/0233 (2013.01) [H03F 3/245 (2013.01); H03F 2200/105 (2013.01); H03F 2200/451 (2013.01); H04B 1/40 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An envelope detector circuit comprising:
an input comprising a positive input line and a negative input line;
a first transistor pair comprising:
a first transistor coupled to the positive input line;
a second transistor coupled to the negative input line; and
a first pair output;
a second transistor pair comprising:
a third transistor coupled to the positive input line;
a fourth transistor coupled to the negative input line; and
a second pair output;
an output comprising:
a positive output line coupled to the first pair output; and
a negative output line coupled to the first pair output and the second pair output; and
a filter comprising at least one resistor and one capacitor, the filter positioned within the negative output line between the first pair output and the second pair output.