The most used oscillator type in microcontrollers is the pierce oscillator, Abracon introduces you to its circuit basics and how the oscillator works. Link here (PDF) Today, the majority of electronic circuits (including microprocessors, microcontrollers, FPGAs, and cPLds) are based on clocked logic, requiring a timing source. depending on the frequency accuracy requirements, some employ […]
Tag Archives: Crystal oscillator
App note: Benefit of measuring crystal In-Circuit
App note from Abracon on measuring in circuit oscillator loop of most MCUs with internal amplifier unit to ensure proper operation. Link here Growing technology trends including green energy initiatives and the explosive growth of IoT centric solutions, are driving the need to accurately define the frequency-selective network in order to achieve the best possible […]
App note: Crystal oscillator troubleshooting guide
App note from NXP Semiconductors dealing with oscillators in microcontrollers. Link here (PDF) Most microcontrollers can use a crystal oscillator as their clock source. Other options include external canned oscillators, resonators, RC oscillators, and internal clocks. The main advantages of a crystal oscillator are frequency accuracy, stability, and low power consumption. However, high reliability is […]
Crystal oscillator teardown
Here’s a tear down of a crystal oscillator and a look at the silicon controller from Electronupdate: Inside is a ceramic circuit board. Ceramic has a low coefficient of thermal expansion which is probably very desirable here. It will also not absorb moisture. All of this would affect the frequency. More details on Electronupdate blog. Check out the […]
Crystal oscillator frequencies
Drone refers us to this table of Crystal oscillator frequencies from Wikipedia: Wikipedia has a nice table of “Crystal oscillator frequencies”. The table includes a column of crystals divisible by powers of 2 which may be appropriate for Real Time Clock (RTC) references… Xtal frequencies covered in the table (at my post-time) cover 32768KHz through […]