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Switched current resistor programmable gain array for low-voltage wireless LAN and method using the same
Pui In Mak; Seng Pan U; Rui P Martins
Rights HolderUNIVERSITY OF MACAU
CountryUS
Subtype发明专利
AbstractA switched current resistor (SCR) PGA for constant-bandwidth gain control includes an inverting amplifier, a feedback resistor forming a feedback loop between an output side and an input side of the inverting amplifier, and a switched current resistor (SCR) array connected in parallel to the feedback resistor, and configured to tune a gain range between a maximum and a minimum. The SCR array includes a plurality of switched resistors, each comprising a switch in series with a resistor. When the plurality of switched resistors are switched by a gain-control logic, a plurality of switched current sources and a plurality of grounded resistors are switched correspondingly to deliver a transient current, an equivalent of which flows through the plurality of grounded resistors out from the input side of the inverting amplifier, leading to a feedback factor of the PGA being constant.
Application Date2009-01-16
Patent NumberUS8229382B2
Language英语
Application NumberUS12355649
Open (Notice) NumberUS8229382B2
Fulltext Access
Document TypePatent
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Recommended Citation
GB/T 7714
Pui In Mak,Seng Pan U,Rui P Martins. Switched current resistor programmable gain array for low-voltage wireless LAN and method using the same. US8229382B2.
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