Sensor communication control considering EMC compliance for restraint control module
View Patent ↗A restraint control module is configured to communicate a sync pulse to a sensor. The control module includes a first sync pulse driver and a second sync pulse driver. The first sync pulse driver is connected to a first signal line and the second sync pulse driver connected to a second signal line. The first and second sync pulse drivers being configured to generate a differential sync pulse signal across the first signal line and second signal line using a first signal on the first signal line and a second signal on the second signal line.
1. A restraint control module configured to communicate a sync pulse to a sensor having PSI5 timing compliance, the module comprising:
a first sync pulse driver connected to a first signal line; and
a second sync pulse driver connected to a second signal line, the first and second sync pulse drivers are synchronized to generate a first signal on the first signal line and second signal on the second signal line that form a single sync pulse across the first signal line and second signal line.
2. The restraint control module according to claim 1 , wherein the first signal and second signal form a differential signal that floats relative to ground.
3. The restraint control module according to claim 2 , wherein the first signal and second signal are direct current (DC) biased.
4. The restraint control module according to claim 3 , wherein the first signal is symmetrical with the second signal.
5. A method for communicating a sync pulse to a sensor, the method comprising:
providing a first driver;
providing a second driver;
generating a first signal with the first driver; and
generating a second signal with the second driver, wherein the first and second signal combine to generate an effective sync pulse according to PSI5 specifications.
6. The method according to claim 5 , wherein the first signal has positive initial slope and negative second slope; and wherein the second signal has negative initial slope and positive second slope that are symmetrical with the first signal.
7. A system for a restraint control module configured to communicate a sync pulse to a sensor, the system comprising:
a first sync pulse driver connected to a first signal line; and
a second sync pulse driver connected to a second signal line, the first and second sync pulse drivers being configured to generate a differential sync pulse signal across the first signal line and second signal line, using a first signal on the first signal line and a second signal on the second signal line;
wherein first signal and second signal sum to generate a combined pulse signal that matches PSI5 specifications.
8. The system according to claim 7 , wherein the first signal is floating relative to ground.
9. The system according to claim 8 , wherein the second signal is floating relative to ground.
10. The system according to claim 7 , wherein the first signal is direct current (DC) biased.
11. The system according to claim 10 , wherein the second signal is DC biased.
12. The system according to claim 7 , wherein the first line and the second line are a wire twisted pair.
13. The system according to claim 7 , wherein the first line and the second line have a balanced output impedance.
14. The system according to claim 7 , wherein the first signal is symmetrical with the second signal.
15. The system according to claim 7 , wherein the first signal has a same rise time as the second signal.
16. The system according to claim 7 , wherein the first signal has a same fall time as the second signal.
17. The system according to claim 7 , wherein the first signal has an opposite polarity as the second signal.
18. The system according to claim 7 , wherein the first signal has positive initial slope and negative second slope.
19. The system according to claim 7 , wherein the second signal has negative initial slope and positive second slope.