发明申请
- 专利标题: Cascode signal driver with low harmonic content
- 专利标题(中): 具有低谐波含量的串联信号驱动器
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申请号: US10855369申请日: 2004-05-28
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公开(公告)号: US20050007149A1公开(公告)日: 2005-01-13
- 发明人: Lars Svensson , Sven Mattisson
- 申请人: Lars Svensson , Sven Mattisson
- 专利权人: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
- 当前专利权人: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
- 主分类号: H03F1/22
- IPC分类号: H03F1/22 ; H03K17/16 ; H03K17/687 ; H03K19/003 ; H03K19/0175
摘要:
A method and apparatus for minimizing harmonic content in a digital signal driver circuit are disclosed. A digital input signal applied to an input node generates a corresponding digital output in a circuit with two or more MOS devices in cascode connection with each other. The slew rate of leading or trailing edge transitions associated with the output signal are controlled using one or more parasitic capacitances associated with the fabrication of two or cascode connected MOS devices. The two or more cascode connected MOS devices may further each have gate electrodes connected to a fixed potential so as to minimize the harmonic content. A control signal may further be applied to each gate electrode to turn off a leakage current path between source and drain electrodes. Harmonics may further be controlled by limiting a conductance between gate electrodes and fixed potentials using an active or passive device.
公开/授权文献
- US07205807B2 Cascode signal driver with low harmonic content 公开/授权日:2007-04-17