High linearity and low noise amplifier with continuously variable gain control

A tuner comprising:

• an amplifier configured to amplify input signals, the amplifier containing:
• a pair of transistors each having a control terminal,
• an output terminal of the amplifier disposed between each transistor and a power supply input,
• a first network connected between each power supply input and output terminal, the first network containing a first resistor and a first switch connected in parallel with the first resistor, and
• a second network connected between the transistors, the second network containing a first and second combination, each of the first and second combination containing a second resistor and a plurality of second switches connected in parallel with the second resistor, the first and second combination connected by a plurality of third switches,
• a mixer configured to down-convert the amplified signals;
• and
• a gain stage configured to amplify the down-converted signals.