Sense amplifier
First Claim
1. A sense amplifier circuit comprising:
- a first path including a first transistor, a second transistor, and an intermediate node coupled between the first and second transistors;
switch circuitry to selectively couple a reference cell to the first path during a first phase of a read operation and to selectively couple a memory cell to the first path during a second phase of the read operation to generate a voltage at the intermediate node that is indicative of a value of a bit stored by the memory cell; and
a bias circuit coupled to the first and second transistors, the bias circuit to generate a first current based on a current through the first transistor and pass the first current through a third transistor to provide a bias voltage to a gate terminal of the second transistor.
4 Assignments
0 Petitions
Accused Products
Abstract
Embodiments include a sense amplifier circuit including first and second paths that may be selectively coupled to a memory cell or a reference cell as part of a two-phase read process. The sense amplifier may include a biasing circuit to provide an adaptive bias voltage to a transistor of the first and/or second path to cause the transistor to provide a voltage across the memory cell and/or reference cell that is substantially constant across process corners. Additionally, or alternatively, the sense amplifier may include a DC-coupled regenerative latch circuit to generate a digital output signal based on a voltage difference between nodes of the first and second paths at or near the end of the second phase. Additionally, or alternatively, trimmable offset resistors may adjust a resistance value provided to the sense amplifier by the memory cell and/or reference cells. Other embodiments may be described and claimed.
37 Citations
11 Claims
-
1. A sense amplifier circuit comprising:
-
a first path including a first transistor, a second transistor, and an intermediate node coupled between the first and second transistors; switch circuitry to selectively couple a reference cell to the first path during a first phase of a read operation and to selectively couple a memory cell to the first path during a second phase of the read operation to generate a voltage at the intermediate node that is indicative of a value of a bit stored by the memory cell; and a bias circuit coupled to the first and second transistors, the bias circuit to generate a first current based on a current through the first transistor and pass the first current through a third transistor to provide a bias voltage to a gate terminal of the second transistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
Specification