Patent ID: 9203349
Filing Date: 2015-12-01
Classification: H03F

Abstract:
1. An ultra-wideband low-noise amplifier circuit with low power consumption, comprising: a cascode amplifier circuit module adapted to receive an input signal, and configured to output a first output signal and a second output signal; and an output combining circuit module coupled to said cascode amplifier circuit module for receiving the first output signal and the second output signal, and configured to apply respective phase shifts to the first output signal and the second output signal for reducing a phase difference between the first output signal and the second output signal, so as to obtain a combined output signal; wherein said cascode amplifier circuit module includes a first transistor and a second transistor that are adapted to be coupled in series between a voltage source and a ground node, each of said first transistor and said second transistor having a first terminal, a second terminal, and a control terminal, the first output signal being outputted at said first terminal of said first transistor, the second output signal being outputted at said second terminal of said second transistor; and wherein each of said first transistor and said second transistor further has a body terminal, and said cascode amplifier circuit module further includes: a body resistor having a first terminal disposed to receive a self-forward body bias voltage, and a second terminal coupled to said body terminal of said second transistor; and a matching inductor having a first terminal disposed to receive the input signal, and a second terminal coupled to said control terminal of said second transistor.