Phase-Locked Loop Circuit

Product Specifications

Technical details and manufacturing context for Phase-Locked Loop Circuit

Definition

The Phase-Locked Loop (PLL) Circuit is a component used in computer, electronic, and optical product manufacturing. It synchronizes the phase and frequency of an output oscillator signal with a reference input signal, enabling precise timing, clock recovery, and frequency synthesis. The circuit compares the phase of the input reference with the output of a voltage-controlled oscillator (VCO) using a phase detector. The resulting error voltage is filtered and applied to the VCO, adjusting its frequency to minimize phase difference, thereby locking the output to the reference. This PLL is designed for industrial applications, with a supply voltage range of 3.3–5.0 V DC, operating frequency range of 1–100 MHz, and phase noise of -100 to -80 dBc/Hz at 10 kHz offset. Lock time is 1–10 ms, reference input sensitivity is 0.5–1.0 Vpp, and output drive capability is 10–50 pF. Operating temperature range is -40 to 85 °C, power consumption is 10–100 mW, and package type is QFN-24. Input impedance is 50–100 Ω, output phase noise floor is -150 to -130 dBc/Hz, and spurious suppression is -70 to -50 dBc. Materials include semiconductor silicon, copper, and dielectric materials. These values are directory references and must be verified with the manufacturer for specific models. The PLL is a critical component in Sync Logic Controllers, ensuring stable system operation. It is not a standalone product but a part for integration. For procurement, confirm model-specific parameters and standards with the supplier.

Working Principle

The PLL circuit compares the phase of the input reference signal with the phase of the output from a voltage-controlled oscillator (VCO) using a phase detector. The phase detector generates an error voltage proportional to the phase difference. This error voltage is filtered and applied to the VCO, adjusting its frequency to minimize the phase difference, thereby locking the output signal's phase and frequency to the input reference.

Common Materials

Semiconductor silicon, Copper, Dielectric materials

Technical Parameters

Parameter	Typical range	Notes & selection driver
Supply Voltage	3.3–5.0 V DC	Operating range for standard logic levels
Operating Frequency Range	1–100 MHz	Depends on VCO and divider settings
Phase Noise	-100–-80 dBc/Hz @10 kHz offset	Lower is better for signal purity
Lock Time	1–10 ms	Time to achieve phase lock after frequency change
Reference Input Sensitivity	0.5–1.0 Vpp	Minimum input amplitude for reliable locking
Output Drive Capability	10–50 pF	Maximum capacitive load on output
Operating Temperature Range	-40–85 °C	Industrial grade; extended range available
Power Consumption	10–100 mW	Depends on frequency and supply voltage
Package Type	QFN-24	Other packages available on request
Input Impedance	50–100 Ω	Termination for reference input
Output Phase Noise Floor	-150–-130 dBc/Hz	At high frequency offsets
Spurious Suppression	-70–-50 dBc	Rejection of unwanted spurs

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Phase Detector
Compares phase difference between input and feedback signals

Material: Semiconductor
Loop Filter
Filters the phase detector output to control the VCO

Material: Passive components (resistors, capacitors)
Voltage-Controlled Oscillator
Generates output signal with frequency controlled by input voltage

Material: Semiconductor, inductor, capacitor
Frequency Divider
Divides VCO output frequency for feedback comparison

Material: Semiconductor

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Phase-Locked Loop Circuit.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Sync Logic Controller

View system integration details

Manufacturers of Phase-Locked Loop Circuit

Manufacturer profiles associated with Phase-Locked Loop Circuit.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 6 September 2026

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Frequently Asked Questions

What is the typical supply voltage range for this PLL circuit?

The directory lists a supply voltage range of 3.3–5.0 V DC for standard logic levels. Always confirm the exact requirement with the manufacturer for your specific model.

What is the operating frequency range?

The operating frequency range is 1–100 MHz, depending on VCO and divider settings. Verify the actual range for your application with the supplier.

What is the phase noise performance?

Phase noise is listed as -100 to -80 dBc/Hz at 10 kHz offset. Lower values indicate better signal purity. Confirm the specification for your model.

What is the lock time?

Lock time is 1–10 ms, representing the time to achieve phase lock after a frequency change. This should be verified for your specific operating conditions.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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voltage:	1.8V to 5.5V (supply voltage range)
frequency:	DC to 3GHz (operating frequency range)
phase noise:	-100dBc/Hz at 1MHz offset (typical specification)
temperature:	-40°C to +125°C (typical industrial range)

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

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