发明名称 |
Stimulated quick start oscillator |
摘要 |
An oscillation circuit including a resonating element such as a crystal, an inverting amplifier and a resistor that each span the resonating element terminals, and two capacitors that capacitively couple the resonating element terminals to ground. An AC current source such as a temperature compensated and properly trimmed ring oscillator generates a differential AC current when active. The differential AC current has a frequency that is within a tolerance of the resonant frequency of the resonant element for a given set of operating conditions. Two buffers connect the differential outputs of the AC current source to respective terminals of the resonating element to thereby shorten startup time. A control logic circuit carefully times the application of the differential AC current to the resonating element terminals such that the current is applied for a sufficient time such that startup would occur under any anticipated operating condition.
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申请公布号 |
US6819195(B1) |
申请公布日期 |
2004.11.16 |
申请号 |
US20030384094 |
申请日期 |
2003.03.07 |
申请人 |
AMI SEMICONDUCTOR, INC. |
发明人 |
BLANCHARD SHANE A.;RICE JEREMY J. |
分类号 |
H03B5/06;H03K3/011;H03K3/014;H03K3/03;(IPC1-7):H03B5/06 |
主分类号 |
H03B5/06 |
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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