Techniques for designing wide band low noise amplifiers
AssigneeAgere Systems Inc.
InventorsTienyu Chang, Jinghong Chen
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Abstract
A wideband amplifier having an amplifier input terminal and an amplifier output terminal includes at least one transistor coupled to the amplifier input terminal and an impedance element coupled between the amplifier input terminal and the amplifier output terminal. A feedback signal is transmitted between the amplifier output terminal and the amplifier input terminal by way of the impedance element wherein the feedback signal varies in accordance with changes in an impedance of the impedance element so as to peak a frequency response of the amplifier.
Claims56
A wideband amplifier having an amplifier input terminal and an amplifier output terminal, comprising:
- at least one transistor coupled to said amplifier input terminal;
- an impedance element coupled between said amplifier input terminal and said amplifier output terminal;
- and
- a feedback signal transmitted between said amplifier output terminal and said amplifier input terminal by way of said impedance element wherein said feedback signal varies in accordance with changes in an impedance of said impedance element so as to peak a frequency response of said amplifier.
An RF amplifier circuit having an amplifier input terminal and an amplifier output terminal, comprising:
- an RF input signal to be amplified wherein said RF input signal is received by said amplifier input terminal;
- an amplifier RF output signal provided at said amplifier output terminal in accordance with said RF input signal;
- and
- an active inductor coupled to said amplifier output terminal.
Dependencies are inferred from the claim text.