晶体振荡器的基础和晶体rfPICM和PIC微®器件选择

Oscillators are an important component of radio fre-
quency (RF) and digital devices. Today, product design
engineers often do not find themselves designing oscil-
lators because the oscillator circuitry is provided on the
device. However, the circuitry is not complete. Selec-
tion of the crystal and external capacitors have been
left to the product design engineer. If the incorrect crys-
tal and external capacitors are selected, it can lead to a
product that does not operate properly, fails prema-
turely, or will not operate over the intended temperature
range. For product success it is important that the
designer understand how an oscillator operates in
order to select the correct crystal.
AN826
Crystal Oscillator Basics and Crystal Selection
for rfPICTM and PICmicro Devices
What temperature stability is needed?
Author: Steven Bible
Microchip Technology Inc. What temperature range will be required?
Which enclosure (holder) do you desire?
INTRODUCTION What load capacitance (CL) do you require?
What shunt capacitance (C0) do you require?
Oscillators are an important co