Adjustable switchpoint receiver
AssigneeInternational Business Machines Corporation
InventorsDaniel Dreps, John Schiff, Glen Wiedemeier
Life of this patent
Estimating the term…
Abstract
A signal detector circuit and digital signal receiver implementing the same. In one embodiment the digital signal receiver includes a switch point detector having a detector output and including a transistor array comprising one or more pull-up branches and one or more pull-down branches. A switch point control circuit is coupled to the switch point detector. The switch point control circuit generates branch enable signals for selectively enabling or disabling said one or more pull-up branches and said one or more pull-down branches in a detector output polarity dependent manner.
Claims17
A digital signal receiver comprising:
- a switch point detector having a detector output and including multiple switch point control branches;
- and
- a control circuit coupled to said switch point detector, said control circuit generating branch enable signals coupled to branch enable inputs of said multiple switch point control branches for selectively enabling or disabling said multiple switch point control branches to effectuate hysterisis or anti-hysterisis control of said detector output.
A circuit for adjustably detecting an input signal comprising:
- a switch point detector including a transistor array comprising one or more pull-up branches and one or more pull-down branches, each of said one or more pull-up branches and one or more pull-down branches having a signal detect input at which said input signal is received and an enable input for enabling or disabling switching of said one or more pull-up branches and said one or more pull-down branches;
- and
- a control circuit coupled between an output node of said switch point detector and the enable inputs of the one or more pull-up branches and one or more pull-down branches, said control circuit providing level-dependent branch enable signals for enabling or disabling said one or more pull-up branches and said one or more pull-down branches as a function of the logic level at the output node of said switch point detector.
Dependencies are inferred from the claim text.