资料介绍
模拟设计的100条经验
1/ Capacitors and resistors have parasitic inductance, about 0.4nH for
surface mount and 4nH for a leaded component.
2/ If you don"t want a high bandwidth transistor to oscillate place lossy
components in at least 2 of the 3 leads. Ferrite beads work well.
3/ When taking DC measurements in a circuit and they don"t make sense,
suspect that something is oscillating.
4/ Opamps will often oscillate when driving capacitive loads.
5/ The base-emitter voltage Vbe of a small signal transistor is about 0.65v
and drops about 2mV/deg C. Vbe goes down with increasing temp.
6/ Multiply 0.13nV by the square root of the ohmic value of a resistor to
find the noise in a 1Hz bandwidth. Then multiply by the square root of the
BW in Hz gives the total noise voltage.
7/ Johnson noise current goes down with a
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