发明名称 |
Hybrid binary/thermometer code for controlled-voltage integrated circuit output drivers |
摘要 |
A hybrid binary/thermometer code is employed to adjust the output impedance of a variable impedance output driver circuit having an impedance network comprising a plurality of impedance legs each programmably electrically connectable according to the hybrid binary/thermometer code in parallel between a voltage source and the signal pad. The plurality of impedance legs are partitioned into one or more set pairs of binary stepped impedance legs and corresponding thermometer stepped impedance legs. A binary set of calibration signals in the hybrid binary/thermometer code steps a given set of binary stepped impedance legs according to a binary code and a thermometer set of calibration signals in the hybrid binary/thermometer code steps the corresponding set of thermometer stepped impedance legs according to a thermometer code once per full count iteration of the binary set of calibration signals.
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申请公布号 |
US7088129(B2) |
申请公布日期 |
2006.08.08 |
申请号 |
US20040835906 |
申请日期 |
2004.04.30 |
申请人 |
AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD. |
发明人 |
HUMPHREY GUY HARLAN;LINAM DAVID LAWRENCE |
分类号 |
H03K19/00;H03K19/003 |
主分类号 |
H03K19/00 |
代理机构 |
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