FEEDBACK AND IMPEDANCE CIRCUITS, DEVICES AND METHODS FOR BROADBAND RADIO-FREQUENCY AMPLIFIERS

摘要

Feedback and impedance circuits, devices and methods for broadband radio-frequency (RF) amplifiers. An RF amplifier architecture can include an amplifier having a first field-effect transistor (FET) and a second FET arranged in a cascode configuration. The gate of the first FET can be configured to receive an RF signal, the drain of the first FET can be coupled to the source of the second FET, and the drain of the second FET can be configured to output an amplified RF signal. The RF amplifier architecture can further include a first feedback circuit implemented between the drain of the second FET and the gate of the second FET to provide gain control, and a second feedback circuit implemented between the drain of the second FET and the gate of the first FET to provide an increase in a frequency range having a desirable range of gain.

主权项

1. A radio-frequency (RF) amplifier architecture comprising:
an amplifier including a first field-effect transistor (FET) and a second FET arranged in a cascode configuration, each of the first FET and the second FET having a gate, a source, and a drain, the gate of the first FET coupled to an input node for receiving an RF signal, the drain of the first FET coupled to the source of the second FET, the drain of the second FET coupled to an output node for outputting an amplified RF signal; a first feedback circuit implemented between the drain of the second FET and the gate of the second FET, the first feedback circuit configured to provide gain control; and a second feedback circuit implemented between the drain of the second FET and the gate of the first FET, the second feedback circuit configured to provide an increase in a frequency range having a desirable range of gain.