simple crystal oscillator circuit

of these two capacitors in series should be equal to the load capacitor. Note that the general IC pins have the equivalent input capacitor, which cannot be ignored. Generally, the load capacitor of the crystal oscillator is 15 P or 12.5 P. If the equivalent input capacitor of the element pin is considered, the two 22p capacitors constitute the oscillator

1. Differences between crystal oscillator and Crystal Oscillator 1)Crystal OscillatorIt is short for the source crystal oscillator, also known as the

Target's clock frequency and network are properly synchronized. We know that the DAC (digital-to-analog converter) and Frequency offset (clock frequency offset) have an approximate linear relationship, the dac-frequency offset curve is determined by two elements, one is the base value (nominal value), and the other is the slope of the curve ( Slope). The so-called reference value refers to the value of the DAC when the Frequency offset value is zero, and if you know the value of Slope, you can

Andrew Huang[Email protected]Driving the digital circuit is the clock signal, the timing circuit requires an external clock signal to drive, complete the timing, synchronization, counting, timing control and other functions. Like the CPU is also a sequential signal driven to complete a variety of operations, and like Arm band module is mostly related to timing, so understanding the clock signal is very impo

communication are common examples of applications.The simplest way is to use a thermistor temperature sensor in the circuit to manipulate a piezoelectric capacitor in the feedback circuit to make the crystal oscillator frequency more stable.A more precise approachFor example, a microcontroller-controlled

thickness can be done but the cost is very high, the chip will be broken once it is merged into a finished product. Therefore, in high-frequency crystals, it is generally possible to use the technology of Tri-panic, five-panic, and seven-panic. The so-called wildcard is actually its higher harmonic. For example, a crystal oscillator with a fundamental frequency of 16 MHz can obtain a 48 MHz frequency after

1. ConceptThe electrical equivalent of a capacitor and a resistor in parallel in tandem with a capacitor two-terminal network, there are two resonant points, the lower frequency is series resonance, the higher the frequency is the parallel resonance.These two frequencies close, and then very narrow frequency range, the crystal is equivalent to an inductor, as long as the two ends of the crystal

Transistor oscillator circuit Simple, low-cost, transistor oscillator circuit, brief analysis, learning oscillator circuit, in the past found that there are several other produ

I just got the new board and burned the program into it, but the running address is incorrect. I didn't enter the C LanguageCheck the following four conditions:1. Check whether the chip power supply is correct2. Check whether the crystal oscillator line is short-circuited.3. Check whether the load capacitor is correct4. Check whether your reset circuit components

Just got the new board, the program burned in, but the wrong run address, did not enter the C language Did not enter the C language, there may be hard dog problems, to remove the hard dog Check the following four cases 1. Check the chip power supply is all right2. Check if the crystal oscillator line is shorted3. Check that the load capacitance is correct4. Check that your reset

In general applications (not using USB, the accuracy requirements are not high) the LPC17XX series in addition to using external crystals, the internal 12MHZ crystals can also be used as the oscillator source. In fact, before running the initialization program, before entering the user program (main function), LPC17XX is using an internal crystal, which is designed to allow the bootstrap code (commonly know