This thesis is composed of two critical circuit designs for FlexRay ECU (Electron-ics Control Unit), i.e., a transceiver with over-current protection, and a digital over-temperature protection circuit.
Regarding the transceiver with over-current protection, to reduce the glitch prob-lem, we propose to use delay cells in the transmitter. In order to avoid the transmitter current which is higher than the upperbound defined by FlexRay specifications, we propose a current comparator circuit to detect the state where the transmitter should stop sending signals.
The temperature protection is required for FlexRay specifications. We propose an over-temperature circuit in the thesis. By utilizing an oscillator-based structure, fre-quency to digital converter (FDC) circuit is developed as the core of the temperature protection mechanism. It will convert the frequency signal and output the sensed tem-perature in a digital code format. The output frequency at different process and temper-ature corners show a linear feature such that the range and accuracy of temperature de-tection is enhanced.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0711112-145220 |
| Date | 11 July 2012 |
| Creators | Lin, Sheng-Chih |
| Contributors | Chau-Chin Wang, Jih-ching Chiu, Shen-Fu Hsiao, Chin-Long Wey |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0711112-145220 |
| Rights | user_define, Copyright information available at source archive |
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