Application Report
SBOA094 - August 2003
Measuring Board Parasitics in High-Speed Analog Design
Rea Schmid High Speed Products
ABSTRACT
essful circuit designs using high−speed amplifiers can depend upon understanding and
identifying parasitic printed circuit board (PCB) components. Simulating a design while
including PCB parasitics can protect against unpleasant production surprises. This
application report discusses an easy method for measuring ponents in a
prototype or final PC board design by using a standard oscilloscope and low frequency
waveform generator to collect valuable information for SPICE simulation.
Contents
1 High Speed Circuit Design. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2 Determining the Source of the Capacitance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3 Capacitive and Inductive Measurement Techniques. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4 Measurement Notes and Aids. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
List of Figures
Figure 1. Example Circuit for 900MHz Frequency Amplifier, Gain 2 Stage. . . . . . . . . . . . . . . . . 2
Figure 2. Example Circuit for 900MHz Frequency Amplifier, Gain 2 Stage,
高速模拟设计中电路板寄生效应测试 来自淘豆网m.daumloan.com转载请标明出处.
