PD7500002 Datasheet/PDFOscillators
A PD7500002 oscillator is a type of circuit applied in many modern applications, such as radio receivers, digital logic systems, and medical equipment. Similar to other forms of oscillators, the PD7500002 circuit produces an oscillating output signal (sine waveform) at a specific frequency.
Application Field
The PD7500002 oscillator can be included within electronic systems to serve as a reference frequency for the system\'s circuits. For instance, if the PD7500002 is used as a reference frequency for a radio receiver, its output signal must be stable and highly accurate over a wide range of frequencies. Additionally, the PD7500002 can be found in digital logic systems which use pulse-shaped/rotating link signals. Its use here provides synchronized signals on multiple channels, as contained within synchronous digital systems.
In the medical equipment field, PD7500002 oscillators are widely used modalities such as ultrasonography, ultrasonic propulsion, lithotripsy and magnetic resonance imaging (MRI). These modalities typically require high-performance, stable, and accurate signals. Hence, the PD7500002\'s characteristics of precise frequency, low phase noise, and low jitter are highly desirable in such applications.
Working Principle
At the core of the PD7500002 oscillator circuit sits a pair of inductors and capacitors (L1⋅C1 and L2⋅C2) connected in parallel. This circuit produces a signal of frequency determined by the equation f0 = 1/2π√L1C1/L2C2. A positive feedback loop allows the output signal to become self-sustaining and keep oscillating at a stable frequency.
The output signal also passes through C3, which prevents any direct current (DC) offset signal from getting into the output. This AC coupling capacitor (C3) also prevents any noise present in the DC circuit from displaying in the output signal. Moreover, R2 forms a voltage divider and provides another layer of low-frequency noise blocking.
Finally, the output signal goes through amplifier A1 and gets adjusted by resistor R4. Resistor R3 stabilizing the oscillator’s transient behavior, while R4 serves to adjust the output amplitude of the signal. This provides a way of fine-tuning one of the most important factors of the PD7500002 oscillator, its output accuracy.