James K Cho

50311808, Jul 9, 1991

Apr 11, 1989

7/336499

George W. McIver - Redondo Beach CA
John R. Marum - Berkeley CA
James B. Cho - Gardena CA

TRW Inc. - Redondo Beach CA

G06F 1118

371 36

A fault tolerant register employing triple redundant storage of data and continuous voting to protect the data from Single Event Upset, or SEU. The fault tolerant register includes a single master multiplexer, three slave multiplexers connected in parallel to the output of the master multiplexer and three voting circuits positioned in feedback paths of the slave multiplexers. The slave multiplexers provide triple redundant storage for the data and the voting circuits correct any data that might become disrupted. The fault tolerant register of the present invention provides greatly improved SEU tolerance without a large increase in circuit area or without resorting to error correction and its attendant scrubbing process.

48498475, Jul 18, 1989

Dec 21, 1987

7/135476

George W. McIver - Redondo Beach CA
James B. Cho - Simi Valley CA

H02H 316
H02H 720

361 88

An adjunct switch circuit is provided for detecting power to ground leaks in a portion of a chip circuit and for disabling such circuit portion in the event of a leak. The switch circuit of the invention is particularly useful for Wafer Scale Integration, and is conveniently employed in the testing of chip circuits following manufacturing. In a preferred embodiment, the switch circuit includes a power supply, including a voltage source and a ground, a reset line for receiving a reset pulse, a first switch, connected in series with one of the power supply lines to the circuit portion ground and inversely responsive to both the reset pulse and the state of the circuit portion ground following termination of the reset pulse, and a second switch, connected between ground and the circuit portion ground and directly responsive to the reset pulse to leak current from the circuit portion ground to ground when turned on by the reset pulse.

20230016398, Jan 19, 2023

Jul 13, 2022

17/864251

- Lafayette CO, US
Srinivasan A. Suresh - Louisville CO, US
Logan Fettes - Lafayette CO, US
James Cho - Denver CO, US

B64G 1/64
B64G 1/40

Material transfer interfaces for space vehicles, and associated systems and methods are disclosed. A representative system includes a first coupler configured to be carried by a first space vehicle, and a first valve device carried by the first coupler. The system further includes a second coupler configured to be carried by a second space vehicle and a second valve device carried by the second coupler. The first coupler includes rotatable and translatable latch arms positioned to engage with and connect to the second coupler. The first valve device incudes a moveable probe that is insertable into the second valve device when the latch arms of the first coupler are connected to the second coupler to transfer fluid between the first and second valve devices.