Threshold control circuitry for multiple current signal receivers
AssigneeNational Semiconductor Corporation
InventorsAdam Fish, John Lynch
Life of this patent
Estimating the term…
Abstract
Calibration circuitry and method for maintaining constant signal detection thresholds for multiple signal receivers that receive data signals in the form of current signals. A value of one of the incoming current signals having a predetermined signal pattern is detected and used to generate threshold control signals for each of the signal receivers to control the data signal detection thresholds.
Claims19
An apparatus including control circuitry for controlling a plurality of signal thresholds for a plurality of current signal receivers, comprising:
- a plurality of current signal receiver circuits each of which is responsive to reception of a respective one of a plurality of threshold control signals and a respective one of a plurality of current signals by providing a respective one of a plurality of data signals, wherein each one of said plurality of data signals corresponds to a respective one of said plurality of current signals;
- and
- control circuitry coupled to said plurality of current signal receiver circuits and responsive to reception of at least a portion of one of said plurality of current signals by providing said plurality of threshold control signals, wherein each one of said plurality of threshold control signals has a respective value related to said one of said plurality of current signals.
An apparatus including control circuitry for controlling a plurality of signal thresholds for a plurality of current signal receivers, comprising:
- a plurality of current signal receiver means each of which is for receiving a respective one of a plurality of threshold control signals and a respective one of a plurality of current signals and providing a respective one of a plurality of data signals, wherein each one of said plurality of data signals corresponds to a respective one of said plurality of current signals;
- and
- controller means for receiving at least a portion of one of said plurality of current signals and providing said plurality of threshold control signals, wherein each one of said plurality of threshold control signals has a respective value related to said one of said plurality of current signals.
A method for controlling a plurality of signal thresholds for a plurality of current signal receivers, comprising:
- receiving a plurality of current signals including a selected current signal;
- processing at least a portion of said selected current signal to provide a plurality of threshold control signals, wherein each one of said plurality of threshold control signals has a respective value related to said selected current signal;
- and
- detecting said plurality of current signals in accordance with said plurality of threshold control signals to provide a plurality of data signals, wherein each one of said plurality of data signals corresponds to a respective one of said plurality of current signals.
Dependencies are inferred from the claim text.