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 ……