摘要:
A system for testing over-current fault detection includes first switch 14 to connect a voltage to a load and a capacitor 20;a first monitor circuit 38 that monitors a current from the first switch to the load; a second monitor circuit 200 that monitors a voltage across the capacitor; and a microcontroller 12 configured to control a state of the first switch to connect voltage to the load and verifies over-current detection based upon current generated during charging of the capacitor. The microcontroller an over-current fault condition based upon input from the first monitor circuit and detects a short-circuit fault condition based upon input from the second monitor circuit during test of the first monitor circuit.
摘要:
A system (100) for determining a relative position of a secondary gear (12) includes a gear assembly (10) including a phonic wheel (13) fixed to a primary gear (11) and a secondary gear (12) rotatably engaged to the first gear, a sensor (20) configured to output a signal upon detecting a tooth (14) of the phonic wheel, and a digital logic circuit (30) configured to detect a revolution of the phonic wheel, to generate a primary gear tooth pulse at intervals corresponding to intervals of teeth (15) of the primary gear based on the detected revolution of the phonic wheel, and to generate a secondary gear revolution signal at an interval corresponding to a revolution of the secondary gear (12) based on the primary gear tooth pulse.
摘要:
An error detection and correction (EDAC) circuit (20) mitigates the effect of single event upsets (SEU) events in a redundant memory system (10). The EDAC circuit (20) includes a first input for receiving first data and parity information stored by a first memory device (16) and a second input for receiving second data and parity information stored by a second memory device (18). First parity check logic (50a) calculates parity for the received first data and parity information. Second parity check logic (50b) calculates parity for the received second data and parity information. Bit comparison logic detects (52) differences between the first data and the second data, and between the first parity information and the second parity information. Based on the parity check calculated for the first and second data, and the bit comparison, data select logic (54) selects either the first data or the second data for provision to a data bus (38).
摘要:
A system for testing over-current fault detection includes first switch 14 to connect a voltage to a load and a capacitor 20;a first monitor circuit 38 that monitors a current from the first switch to the load; a second monitor circuit 200 that monitors a voltage across the capacitor; and a microcontroller 12 configured to control a state of the first switch to connect voltage to the load and verifies over-current detection based upon current generated during charging of the capacitor. The microcontroller an over-current fault condition based upon input from the first monitor circuit and detects a short-circuit fault condition based upon input from the second monitor circuit during test of the first monitor circuit.
摘要:
An overcurrent protection circuit for a high side solenoid switch 104 includes a primary bias circuit 110 and a secondary bias circuit 150. The secondary bias circuit is operable to alter a source to gate bias voltage of the high side solenoid switch during an overcurrent.
摘要:
A multi-channel control system includes at least a primary control microprocessor and a back-up control microprocessor operable to control a device. The primary control microprocessor and the back-up control microprocessor assert control over a controlled device according to a locally stored method of controlling a back-up microprocessor assumption of control of a device.
摘要:
An error detection and correction (EDAC) circuit (20) mitigates the effect of single event upsets (SEU) events in a redundant memory system (10). The EDAC circuit (20) includes a first input for receiving first data and parity information stored by a first memory device (16) and a second input for receiving second data and parity information stored by a second memory device (18). First parity check logic (50a) calculates parity for the received first data and parity information. Second parity check logic (50b) calculates parity for the received second data and parity information. Bit comparison logic detects (52) differences between the first data and the second data, and between the first parity information and the second parity information. Based on the parity check calculated for the first and second data, and the bit comparison, data select logic (54) selects either the first data or the second data for provision to a data bus (38).
摘要:
A multi-channel control system includes at least a primary control microprocessor and a back-up control microprocessor operable to control a device. The primary control microprocessor and the back-up control microprocessor assert control over a controlled device according to a locally stored method of controlling a back-up microprocessor assumption of control of a device.
摘要:
A system (100) for determining a relative position of a secondary gear (12) includes a gear assembly (10) including a phonic wheel (13) fixed to a primary gear (11) and a secondary gear (12) rotatably engaged to the first gear, a sensor (20) configured to output a signal upon detecting a tooth (14) of the phonic wheel, and a digital logic circuit (30) configured to detect a revolution of the phonic wheel, to generate a primary gear tooth pulse at intervals corresponding to intervals of teeth (15) of the primary gear based on the detected revolution of the phonic wheel, and to generate a secondary gear revolution signal at an interval corresponding to a revolution of the secondary gear (12) based on the primary gear tooth pulse.