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US 2013/0154737 A1Published application
Comparator and amplifier
AssigneeMediatek Inc.
InventorYun-Shiang SHU
Life of this patent
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Abstract
A comparator has a differential pair circuit, a current control circuit, and a latch. The differential pair circuit has first and second comparator transistors, and is arranged to compare a first input and a second input according to a clock signal to generate a result indicating whether a difference of the first and second inputs exceeds an internal offset. The current control circuit is coupled in series with the differential pair circuit, and configured to provide unequal abilities of drawing currents for the first and second comparator transistors.
Claims18
A comparator, comprising:
- a differential pair circuit, comprising first and second comparator transistors, configured to compare a first input and a second input according to a clock signal to generate a result indicating whether a difference of the first and second inputs exceeds an internal offset;
- and
- a current control circuit, coupled in series with the differential pair circuit, configured to provide unequal abilities of drawing currents for the first and second comparator transistors, respectively.
An amplifier, comprising:
- a differential pair circuit, comprising first and second comparator transistors, configured to compare a first input and a second input when a clock signal is at a first logic level to generate a result indicating whether a difference of the first and second inputs exceeds an internal offset;
- a current control circuit (tail circuit), configured to provide unequal abilities of drawing currents for the first and second comparator transistors respectively;
- an amplification circuit, amplifying the generated result from the differential pair circuit;
- and
- a reset circuit, capable of setting a reference voltage point in the differential pair circuit to a predetermined voltage level when the clock signal is at a second logic level.
2 more elements
Dependencies are inferred from the claim text.