Patent ID: 6624701
Filing Date: 2003-09-23
Classification: H03F

Abstract:
Current amplifier comprisingan input branch having a switch and a first input; an output branch coupled to said input branch; a bias branch coupled to the switch of the input branch, suitable for biasing said input branch, and structured to command the switch by supplying the switch with a first bias voltage so as to substantially block current flowing in said input branch and consequently substantially block current flowing in said output branch when a current applied to said first input is null, wherein said input branch includes a first transistor, said output branch includes a second transistor, and said switch is a MOS transistor having a source connected to said first input, a drain connected to said first and second transistors, and a gate biased by said first bias voltage so as to substantially block current from flowing through the MOS transistor when the current applied to said first input is null and therefore substantially block the conduction of the first and second transistors.