Patent
Programmable sampling time base circuit
Agoston Agoston
- 29 Jan 1987
41
TL;DR: In this paper, a time base circuit for a waveform sampling system produces a strobe signal for triggering an adjustable strobe delay time following the detection of a triggering event in the waveform.
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Abstract: A time base circuit for a waveform sampling system produces a strobe signal for initiating waveform sampling an adjustable strobe delay time following detection of a triggering event in a waveform. The time base circuit includes a strobe control circuit for producing the strobe signal and a strobe sense signal in response to a strobe drive signal, a strobe drive circuit for generating the strove drive signal, an adjustable time after a trigger signal, and a trigger generator for producing the trigger signal in selective response to either the triggering event in the waveform or the strobe sense signal. The strobe signal delay time is calibrated by setting the trigger generator to produce the trigger signal in response to the strobe sense signal thereby causing the strobe drive circuit to generate the strobe drive signal periodically. A period timer measures the period between successive strobe drive signals and a microprocessor adjusts the delay time of the strobe drive circuit so that the period between strobe drive signals is equal a predetermined delay time.
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Citations
Patent
Method and system for embedded disk controllers
Larry L. Byers,Paul B. Ricci,Joseph G. Kriscunas,Joseba M. Desubijana,Gary R. Robeck,Michael R. Spaur,David M. Purdham +6 more
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TL;DR: In this paper, a system for an embedded disk controller is described, which consists of a first main processor operationally coupled to a high performance bus, a second processor operatorally coupled with a peripheral bus, and a bridge that interfaces between the high performance and peripheral bus.
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David M. Purdham,Larry L. Byers,Andrew Artz +2 more
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TL;DR: In this paper, a method and system for generating interrupts in an embedded disk controller is presented, which includes receiving vector values for an interrupt; determining if an interrupt request is pending; comparing the received vector value with a vector value of the pending interrupt; and replacing a previous vector value, if the received value has higher priority.
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Fadi Daou
- 05 Sep 2003
TL;DR: In this article, an apparatus and method for measuring jitter using phase and amplitude undersampling is presented, where a sampling circuit samples an input signal to obtain amplitude and phase information, a computation circuit determines Time Interval Error (TIE) information from the amplitude and Phase information, and a signal processor processes the TIE information to generate a jitter spectrum.
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TL;DR: In this paper, a position error calculator for an embedded disk controller including a burst selector that selects a burst pair based on burst pair format is presented, and a linear position calculator calculates head linear position based on the burst pairs format.
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Method and circuit for receiving dual edge clocked data
Kha Nguyen
- 16 Feb 2000
TL;DR: In this paper, a dual-clocked transfer scheme was proposed to allow the dual edge clocked data to be received using the same controller clock frequency that would be used if the data were transferred only on a single edge.
11
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Patent
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Peter R. Lowe
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