1
Richard W Stallkamp: Graphics display system having data transform circuit. Tektronix, Mark M Meininger, Robert S Hulse, May 2, 1989: US04827250 (40 worldwide citation)

A graphics display system (10) includes a display screen (14) on which images are formed and a data transform circuit (12) that provides transformations between model data representing the basic shape of an object and display data that are employed in the formation of an image of the object on the d ...


2
Alexandru Mitaru, Richard W Stallkamp, Michael Powell: Tightly coupled secondary storage system and file system. Omneon Video Networks, Blakely Sokoloff Taylor & Zafman, May 27, 2003: US06571351 (37 worldwide citation)

A fault tolerant, secondary storage engine (such as a RAID engine) is closely coupled with a file system to achieve greater overall throughput in storage/database applications having a mix of large, sequential access transactions and small, random access transactions. In addition, disk rebuild time ...


3
Errol C Crary, Richard W Stallkamp, Laurence J Morandi, Douglas C Stevens, Alexandru Mitaru: Digital disk recorder using a port clock having parallel tracks along a timeline with each track representing an independently accessible media stream. Tektronix, Francis I Gray, June 24, 1997: US05642497 (10 worldwide citation)

An application programming interface for a digital disk recorder uses a port to link resources together to form a multimedia recorder that emulates a tape recorder while retaining the flexibility of the digital disk recorder. The port is a matrix of timelines for each resource, with each track in th ...


4
Richard W Stallkamp: Digital-to-analog converter for video application. Tektronix, John Smith Hill, Robert S Hulse, January 26, 1988: US04721943 (10 worldwide citation)

A digital-to-analog converter comprises a current source for supplying a current of predetermined magnitude to a circuit node, and a switch connected to the circuit node, and defining a first current path leading to a reference potential terminal and a second current path leading to an output termin ...


5
Richard W Stallkamp, Marc L Ranger: High speed multiplying digital to analog converter. Tektronix, Francis I Gray, Allston L Jones, January 7, 1986: US04563670 (8 worldwide citation)

A high speed four quadrant multiplier is current controlled and uses a high speed differential output current digital to analog converter. Independent adjustment of the multiplying factor without changing the DC offset is accomplished. Also a true zero input signal will cause a true zero output sign ...