Abstract
An accurate equation to estimate simultaneous switching noise (SSN) created by CMOS output buffers is proposed. This analytic equation includes the carrier velocity saturation effects of a short-channel MOS transistor. Simulation results show that the proposed closed-form equation estimates the SSN precisely and the error is below 10% as compared with HSPICE simulation results. Design procedures of a low-bounce tapered buffer which take SSN into consideration are also proposed. Several output buffer design examples are demonstrated to show the significant improvement of the low-bounce buffer design. A test chip of the output buffer is implemented to operate at 400 MHz and the measurement results match the design specifications.
Original language | English |
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Pages (from-to) | 303-311 |
Number of pages | 9 |
Journal | IEE Proceedings: Circuits, Devices and Systems |
Volume | 148 |
Issue number | 6 |
DOIs | |
State | Published - Dec 2001 |