Dale Hartley Leuthold, 8918522 Ravenwood Dr, Saratoga, CA 95070
Dale Leuthold Phones & Addresses
18522 Ravenwood Dr, Saratoga, CA 95070 408-8661939
Los Angeles, CA
New York, NY
18522 Ravenwood Dr, Saratoga, CA 95070 408-8281564
Work
Position:
Retired
Education
Degree:
Associate degree or higher
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Us Patents
Latch Circuit And Method With Complementary Clocking And Level Sensitive Scan Capability
US Patent:
5172011, Dec 15, 1992
Filed:
Jun 30, 1989
Appl. No.:
7/375208
Inventors:
Dale H. Leuthold - Saratoga CA
Paul M. Guglielmi - Westboro MA
Paul M. Guglielmi - Westboro MA
Assignee:
Digital Equipment Corporation - Maynard MA
International Classification:
H03K 3289
H03K 329
H03K 19086
H03K 513
H03K 329
H03K 19086
H03K 513
US Classification:
3072722
Abstract:
Latch circuit and method which permit two-phase latches and flip-flops to be intermixed in a system having level sensitive scanning without critical clock requirements. The circuit includes a master latch having a normal data input and a scan data input, and a slave latch connected to the master latch. A differential pair of clock signals is applied to the latches in a complementary manner during a normal mode of operation to load data from the normal data input to the master latch and to transfer the normal data from the master latch to the slave latch, and two separate low frequency non-overlapping scan clock phases are applied to the latches during a level sensitive scanning mode to load data from the scan data input to the master latch and to transfer the scan data from the master latch to the slave latch.
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