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US 4,375,039 AGranted
Sense amplifier circuit
AssigneeFujitsu Limited
InventorTakahiko Yamauchi
Life of this patent
Estimating the term…
Abstract
A sense amplifier circuit comprising one or two differential amplifiers to each of which are connected one or two reference transistors for producing the reference voltages of the corresponding differential amplifiers. The reference transistors are controlled by input signals and/or output signals of the differential amplifiers.
Claims15
A sense amplifier circuit comprising:
- first and second differential amplifiers connected to a first power supply line, each comprising means for receiving first and second input signals to said sense amplifier with opposite phases and for supplying first and second output signals with opposite phases;
- a first reference transistor connected between the first differential amplifier and a second power supply line and controlled by the first output signal of said second differential amplifier, whose phase is the same as that of said first input signal;
- a second reference transistor connected between said second differential amplifier and said second power supply line and controlled by the first output signal of said first differential amplifier, whose phase is the same as that of said second input signal;
- and
- means for providing two output signals from said sense amplifier circuit having opposite phase, each being selected from said first and second output signals of different ones of said first and second differential amplifiers.
2 more elements
A sense amplifier circuit comprising:
- first and second differential amplifiers connected to a first power supply line, each of which comprises means for receiving first and second input signals with opposite phases and for supplying first and second output signals of opposite phases;
- a first reference transistor connected between said first differential amplifier and a second power supply line and controlled by said first input signal;
- a second reference transistor connected between said second differential amplifier and said second power supply line and controlled by the first output signal of the first differential amplifier whose phase is the same as that of said second input signal;
- and
- means for providing two output signals of said sense amplifier circuit, the first being the second output signal of said first differential amplifier and the second being a first output signal of said second differential amplifier whose phases are the same as those of said second and first input signals, respectively.
2 more elements
A fast sense amplifier having changing reference voltages comprising
- two differential amplifiers, connected to a first common voltage supply, each said differential amplifier comprising means for receiving two input signals to said sense amplifier of opposite phases and for supplying two output signals of opposite phase,
- at least one reference transistor for producing each respective changing reference voltage connected between each said differential amplifier and a second common voltage supply,
- means for controlling one of said at least one reference transistor connected to a first one of said differential amplifiers by a respective selected one of said two output signals of the second differential amplifier, and for controlling one of said at least one reference transistor of the second differential amplifier by a signal selected from said two input signals and said two output signals of said first differential amplifier, each said control signal for each said reference transistor of the first differential amplifier being opposite in phase from each said control signal for each said reference transistor of said second differential amplifier, and
- means for providing two outputs from said sense amplifier, each said sense amplifier output being selected from one of said outputs of each said differential amplifier so that said two sense amplifier outputs have opposite phase,
- wherein the reference voltages provided by said reference transistors are changed during the operation of the fast sense amplifier.
2 more elements
Dependencies are inferred from the claim text.