Tunable radio frequency low noise amplifier

摘要

An apparatus comprising an amplifier comprising an input, a capacitor having a capacitor first side and a capacitor second side, wherein the capacitor first side is coupled to the input, a switch having a switch first side and a switch second side, wherein the switch first side is coupled to the capacitor second side, and a transistor having a transistor gate, and a transistor source, wherein the transistor gate is coupled to the input and the capacitor first side, wherein the transistor source is coupled to the switch second side and wherein the switch is positioned directly between the capacitor second side and the transistor source.

主权项

1. An apparatus comprising:
an amplifier comprising:
an amplifier input;a capacitor having a capacitor first side and a capacitor second side, wherein the capacitor first side is coupled to the amplifier input;a switch having a switch first side and a switch second side, wherein the switch first side is coupled to the capacitor second side;a transistor having a transistor gate, a transistor source, and a transistor drain, wherein the transistor gate is coupled to the amplifier input and the capacitor first side, wherein the transistor source is coupled to the switch second side and wherein the switch is positioned directly between the capacitor second side and the transistor source;an inductor having an inductor first end and an inductor second end, wherein the inductor first end is coupled to the switch second side and the transistor source, and wherein the inductor second end is coupled to a ground;a second capacitor having a second capacitor first side and a second capacitor second side, wherein the second capacitor first side is coupled to the amplifier input, and a second switch having a second switch first side and a second switch second side, wherein the second switch first side is coupled to the second capacitor second side, and wherein the second switch second side is coupled to the first switch second side, the inductor first end, and the transistor source; anda third capacitor having a third capacitor first side and a third capacitor second side, wherein the third capacitor first side is coupled to the amplifier input, and wherein the third capacitor second side is directly connected to the switch second side, the second switch second side, the inductor first side, and the transistor source without any intervening components.