Patent ID: 6703899
Filing Date: 2004-03-09
Classification: H03G,H03M

Abstract:
A switched gain circuit comprising:an input line responsive to an analog signal; an output line; a single current source providing a source of current, said current source being coupled to the output line; and at least three gain signal conduction paths coupled to the input line, the current source and the output line, each conduction path including a plurality of switching devices and at least one gain device, said input line being coupled to a switching device in each conduction path that is separate from the at least one gain device, wherein a control line is coupled to another switching device in each conduction path, said control line providing a control signal to turn on the respective conduction path to transfer the analog signal to the output line with a gain provided by the at least one gain device in that conduction path, and wherein a control signal on a single control line causes one of the conduction paths in the circuit to conduct.