Balanced differential cross-coupled transconductance amplifier for a multiplexor
AssigneeAnalog Devices, Inc.
InventorsKimo Y. F. Tam, Kenneth A. Lawas
Life of this patent
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Abstract
A balanced, differential, cross-coupled amplifier including an input stage for receiving a differential input and including an input transconductance differential pair and a feedback transconductance differential pair; and an output stage responsive to the input stage for providing a differential output; the differential input being connected to one input of the input transconductance differential pair and one input of the feedback transconductance differential pair, the differential output being fed back to one input of the input transconductance differential pair and one input of the feedback transconductance differential pair for balancing the currents in the transconductance differential pairs over the input range.
Claims24
A balanced, differential, cross-coupled amplifier comprising;
- an input stage for receiving a differential input and including an input transconductance differential pair and a feedback transconductance differential pair;
- and
- an output stage responsive to said input stage for providing a differential output;
- said differential input being connected to one input of said input transconductance differential pair and one input of said feedback transconductance differential pair, said differential output being fed back to one input of said input transconductance differential pair and one input of said feedback transconductance differential pair for balancing the currents in said transconductance differential pairs over the input range.
A balanced differential multiplexer comprising:
- a plurality of input stages for receiving differential inputs;
- an output stage responsive to the input stages for providing a differential output;
- each input stage including an input transconductance differential pair and a feedback transconductance differential pair;
- said differential input being connected to one input of said input transconductance differential pair and one input of said feedback transconductance differential pair, said differential output being fed back to one input of said input transconductance differential pair and one input of said feedback transconductance differential pair for balancing the currents in said transconductance differential pairs over the input range.
A balanced differential cross-point switch comprising:
- a plurality of input stages for receiving differential inputs;
- at least one output stage responsive to the input stages for providing a differential output,
- each input stage including an input transconductance differential pair and a feedback transconductance differential pair;
- said differential input being connected to one input of said input transconductance differential pair and one input of said feedback transconductance differential pair, said differential output being fed back to one input of said input transconductance differential pair and one input of said feedback transconductance differential pair for balancing the currents in said transconductance differential pair over the input range.
A switched current source comprising;
- an input stage for receiving a differential input and including an input transconductance differential pair and a feedback transconductance differential pair;
- and
- an output stage responsive to said input stage for providing a differential output;
- said differential input being connected to one input of said input transconductance differential pair and one input of said feedback transconductance differential pair, said differential output being fed back to one input of said input transconductance differential pair and one input of said feedback transconductance differential pair for balancing the currents in said transconductance differential pairs over the input range.
A switched current source comprising:
- a plurality of input stages for receiving differential inputs;
- an output stage responsive to the input stages for providing a differential output;
- each input stage including an input transconductance differential pair and a feedback transconductance differential pair;
- said differential input being connected to one input of said input transconductance differential pair and one input of said feedback transconductance differential pair, said differential output being fed back to one input of said input transconductance differential pair and one input of said feedback transconductance differential pair for balancing the currents in said transconductance differential pairs over the input range.
A switched current source comprising:
- a plurality of input stages for receiving differential inputs;
- at least one output stage responsive to the input stages for providing a differential output.
- each input stage including an input transconductance differential pair and a feedback transconductance differential pair;
- said differential input being connected to one input of said input transconductance differential pair and one input of said feedback transconductance differential pair, said differential output being fed back to one input of said input transconductance differential pair and one input of said feedback transconductance differential pair for balancing the currents in said transconductance differential pair over the input range.
Dependencies are inferred from the claim text.