Patent ID: 8928357
Filing Date: 2015-01-06
Classification: G11C

Abstract:
1. A sense amplifier, comprising: a first cross-coupled transistor pair, having a first end, a second end, a first back gate end and a second back gate end, the first and second ends of the first cross-coupled transistor pair being coupled to an operating voltage, the first and second back gate ends of the first cross-coupled transistor pair being coupled to a first and second output ends respectively; a second cross-coupled transistor pair, having a first end, a second end, a first back gate end and a second back gate end, the first and second back gate ends of the second cross-coupled transistor pair being coupled to a first and second output ends respectively, and the first and second ends of the second cross-coupled transistor pair being coupled to a first digital input end and second digital input end respectively; a first and second current sources, the first current source being coupled between the first digital input end and a ground voltage, the second current source being coupled between the second digital input end and the ground voltage; a first digital input transistor, having a first end, a second end and a control end, the first end of the first digital input transistor receiving a first digital input signal, the second end of the first digital input transistor being coupled to the first digital input end, and the control end of the first digital input transistor being coupled to the second back gate end of the second cross-coupled transistor pair; and a second digital input transistor, having a first end, a second end and a control end, the first end of the first digital input transistor receiving a second digital input signal, the second end of the second digital input transistor being coupled to the second digital input end, and the control end of the second digital input transistor being coupled to the first back gate end of the second cross-coupled transistor pair.