发明名称 |
Micro-controller with FSK modem |
摘要 |
A micro-controller to perform the FSK (HART) modem functions as well as communications and control functions in an isolated channel implementation is described. In one embodiment, the micro-controller comprises: a processor, an analog-to-digital converter configured to transform received analog signals into digital values at a predetermined digital sample rate; and a memory unit containing a set of computer-executable instructions that, when executed on the processor, provide a built-in FSK bi-directional modem function that converts the received digital values into binary signals. The FSK (HART) demodulation function is performed by the micro-controller with the built-in FSK modem function in three sequential phases implemented in computer code: (1) zero crossing and amplitude detection; (2) bit stream and timing generation, and (3) character generation and bit synchronization. |
申请公布号 |
US8290030(B2) |
申请公布日期 |
2012.10.16 |
申请号 |
US20080345393 |
申请日期 |
2008.12.29 |
申请人 |
GOLBORNE CARLOS;TANNENHAUS JAY;SPECTRUM CONTROLS, INC. |
发明人 |
GOLBORNE CARLOS;TANNENHAUS JAY |
分类号 |
H04B1/38;H04L5/16;H04L27/10;H04L27/18 |
主分类号 |
H04B1/38 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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