Variable gain amplifier
AssigneeElectronics and Telecommunications Research Institute
InventorsSeon Ho Han, Hyun Kyu Yu
Life of this patent
Estimating the term…
Abstract
A complementary metal oxide semiconductor (CMOS) variable gain amplifier has a wider decibel-linear gain variation characteristic with respect to a control voltage when a signal is amplified. The variable gain amplifier includes: a bias input circuit for supplying a current corresponding to a bias voltage; an operation region combination and feedback circuit connected to the bias input circuit and combining at least two amplifiers by feedback in response to a control voltage, each amplifier having a decibel-linear characteristic in saturation and triode regions of a complementary metal oxide semiconductor (CMOS); and a bias output circuit connected to the bias input circuit, and outputting bias current controlled by the operation region combination and feedback circuit.
Claims9
A variable gain amplifier comprising:
- a bias input circuit for supplying a current corresponding to a bias voltage;
- an operation region combination and feedback circuit connected to the bias input circuit and combining at least two amplifiers by feedback in response to a control voltage, each amplifier having a decibel-linear characteristic in saturation and triode regions of a complementary metal oxide semiconductor (CMOS);
- and
- a bias output circuit connected to the bias input circuit, and outputting bias current controlled by the operation region combination and feedback circuit.
Dependencies are inferred from the claim text.