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US 4,533,840 AGranted
Soliton sampler
AssigneeInternational Business Machines Corporation
InventorsTushar R. Gheewala, Steven B. Kaplan
Life of this patent
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Abstract
The invention is an all-soliton sampler for accessing very high speed circuits. A soliton is switched in two parallel branches, one including the device-under-test and the other including a programmable delay line implemented in soliton devices. The outputs of these two branches are used as controls to a soliton comparator which, in turn, controls a Josephson detector gate. This circuit permits a relatively slow rise time external trigger pulse to initiate an extremely narrow sampling pulse.
Claims3
A sampling circuit, for a device-under-test, characterized by:
- (a) a soliton generator 2 to provide first and second soliton generator output nodes (Node 1, Node 2);
- (b) connection means (Node 3) for connecting a device-under-test 7 to the first output node (Node 1) of said soliton generator 2 to provide a test signal at a test signal node (Node 4);
- (c) time measurement means including a programmable delay line 8 and soliton comparator 9-14 connected to the second output node (Node 2) of said soliton generator 2, said soliton comparator having first and second soliton comparator output nodes (Node 5, Node 6);
- (d) termination means 13 connected to the first output node (Node 5) of said time measurement means 8-14;
- (e) detection means connected to the second output node of said time measurement means;
- (f) test control means 15 connected to said test signal node (Node 4) and connected across said soliton comparator 9-14;
- and
- (g) sampling control means 16 connected in control mode across said soliton comparator 9-14.
5 more elements
Dependencies are inferred from the claim text.