H - Electricity – 03 – F
Patent
H - Electricity
03
F
H03F 3/45 (2006.01) H03F 1/32 (2006.01) H04B 1/40 (2006.01)
Patent
CA 2559169
A variable-gain amplifier circuit uses a pair of single-ended operational amplifiers to amplify complementary portions of a differential input signal. By using two single-ended amplifiers instead of a single differential amplifier, linearity is significantly improved. In addition, common mode feedback circuitry is eliminated along with harmonic distortion and other forms of noise which tend to negative affect the quality of the signal output from the circuit.
L'invention concerne un circuit amplificateur à gain variable utilisant une paire d'amplificateurs opérationnels asymétriques en vue d'amplifier les parties complémentaires d'un signal d'entrée différentiel. En utilisant deux amplificateurs asymétriques au lieu d'un amplificateur à différentiel unique, la linéarité est significativement améliorée. En outre, des circuits de rétroaction à mode commun sont éliminés avec une torsion harmonique et d'autres formes de bruits qui tendent à affecter négativement la qualité du signal émis par le circuit.
Lee Jeong-Woo
Lee Kyeongho
Lee Seung-Wook
Park Joonbae
Gct Semiconductor Inc.
Gowling Lafleur Henderson Llp
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