发明名称 |
Passive capture adapter circuit for sensing signals of a high-speed circuit |
摘要 |
A multi-stage passive capture adapter (PCA) circuit is configured to sense and recover digital signals present on a high-speed serial bus for capture and analysis in external test equipment. A first stage of the PCA circuit includes a differentiator that functions as a high impedance probe that contacts the serial bus to capture an original input signal waveform of the high-speed digital signals. The signal waveform is fed to a dual-slope comparator/driver that includes a plurality of high-speed comparators and drivers. The second stage includes a differential receiver/shaper that converts logic levels of differential receiver outputs to input signals that set and reset a signal restorer whose output signals are fed to a driver of a driver/shaper. The output of the driver is then fed to a shaper network configured to substantially match an output signal of driver/shaper to the input signal waveform sensed from the high-speed serial bus. |
申请公布号 |
US8643405(B2) |
申请公布日期 |
2014.02.04 |
申请号 |
US201213559964 |
申请日期 |
2012.07.27 |
申请人 |
MOORE TERRILL M.;FLACCO ROY F.;MCCI CORPORATION |
发明人 |
MOORE TERRILL M.;FLACCO ROY F. |
分类号 |
H03B1/00;H03K3/00 |
主分类号 |
H03B1/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|