发明名称 |
Current-controlled p-channel transistor-based ring oscillator |
摘要 |
A current-controlled oscillator (ICO) circuit including an all p-channel transistor based ring oscillator, a first current mirroring stage, and a second current mirroring stage. The all p-channel transistor based ring oscillator, p-channel transistors in the input structure of each amplification stage, and metal lines in the ring and from the ring to the amplification stages over an n-well improve noise immunity and tolerance. The first current mirroring stage utilizes an input current to generate a first voltage controlling a series of differential delay cells connected in a ring topology that forms the ring oscillator. The second mirroring stage utilizes a precision current to generate a second voltage controlling at least one amplification stage, which converts corresponding delay cell output signals to a single-ended logic level signal compatible with external circuitry needs. Each amplification stages utilizes the second control voltage to create a similar or ratioed copy of the precision current flowing in each amplification stage. A second embodiment of the ICO is also included, which operates at a lower frequency, thus higher bandwidth, than that of the first embodiment.
|
申请公布号 |
US6163226(A) |
申请公布日期 |
2000.12.19 |
申请号 |
US19990318481 |
申请日期 |
1999.05.25 |
申请人 |
LUCENT TECHNOLOGIES, INC. |
发明人 |
JELINEK, JULES JOSEPH;BROWN, MICHAEL ARTHUR;SHIRANI, RAMIN |
分类号 |
G05F1/56;H03K3/013;H03K3/03;H03K3/354;H03L1/00;H03L7/099;(IPC1-7):H03B5/02 |
主分类号 |
G05F1/56 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|