Patent ID: 6472936
Filing Date: 2002-10-29
Classification: H03F

Abstract:
A variable gain low-noise amplifier comprising:an input transistor having a first ground terminal coupled to ground and an input terminal coupled to an input signal; a first output transistor having a first output terminal coupled to a second output terminal of said input transistor; a first switch capable of turning said first output transistor ON and OFF by selectively coupling an input terminal of said first output transistor to one of: 1) a first enabling voltage and 2) a first disabling voltage; a second output transistor having a first output terminal coupled to said second output terminal of said input transistor; a second switch capable of turning said second output transistor ON and OFF by selectively coupling an input terminal of said second output transistor to one of: 1) a second enabling voltage and 2) a second disabling voltage; and an inductor comprising a first inductor terminal coupled to a supply voltage, a second inductor terminal coupled to a second output terminal of said first output transistor, and a first tap point intermediate said first and second inductor terminals coupled to a second output terminal of said second output transistor.