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US 6,958,646 B1Granted
Autozeroing floating-gate amplifier
AssigneeImpinj, Inc.
InventorsWilliam T. Colleran, Todd E. Humes, Christopher J. Diorio
Life of this patent
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Abstract
An autozeroing floating-gate amplifier (AFGA) is implemented utilizing a programmable gain element, the characteristics of which may be changed by changing the amount of charge stored on a floating gate device.
Claims17
An autozeroing floating gate amplifier, comprising:
- a floating node;
- at least one input capacitively coupled to said floating node;
- an output node;
- a feedback capacitor coupled between said floating node and said output node;
- a charge transfer device having an insulating terminal coupled to said floating node and a control terminal coupled to said output node, said charge transfer device adapted to transfer charge to said floating node in response to a signal on said output node;
- and
- a gain device having an input coupled to said floating node and an output coupled to said output node.
4 more elements
An autozeroing floating gate amplifier, comprising:
- means for storing charge;
- input means for receiving input signal capacitively coupled to said means for storing charge;
- output means for outputting a signal;
- feedback means coupled between said means for storing charge and said output means;
- charge transfer means coupled to said means for storing charge for transferring charge to the means for storing charge responsive to said output means;
- and
- amplification means for amplifying a signal, said amplification means having an input coupled to said means for storing charge and an output coupled to said charge transfer means and to said output means.
4 more elements
Dependencies are inferred from the claim text.