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US 12,212,286 B2Granted
Complementary envelope detector
AssigneeQorvo US, Inc.
InventorsMarcus Granger-Jones, Nadim Khlat
Life of this patent
Estimating the term…
Abstract
A complementary envelope detector contemplates using two pair of mirrored transistors to provide a differential output envelope signal to an associated envelope tracking integrated circuit (ETIC) that supplies control voltages to an array of power amplifiers. While bipolar junction transistors (BJTs) may be used, other exemplary aspects use field effect transistors (FETs). In an exemplary aspect, a first pair are negative channel FETs (nFETs) and a second pair are positive channel FETs (pFETs).
Claims19
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.
14 more elements
A wireless device comprising:
- 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;
- and
- an envelope tracking (ET) radio frequency (RF) front-end circuits comprising:
- an ET integrated circuit (ETIC) coupled to the output, the ETIC configured to generate at least one control voltage based on a signal from the envelope detector circuit;
- and
- a plurality of power amplifiers coupled to a plurality of antenna ports, respectively, at least one of the plurality of power amplifiers coupled to the ETIC and configured to receive the at least one control voltage.
20 more elements
Dependencies are inferred from the claim text.