Structured Manufacturing Data (2026)

Phase-locked loop

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Phase-locked loop used in the Computer, Electronic and Optical Product Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Phase-locked loop is characterized by the integration of Phase Detector and Loop Filter. In industrial production environments, manufacturers listed on CNFX commonly emphasize Semiconductor (Silicon) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A control system that generates an output signal whose phase is related to the phase of an input reference signal.

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Product Specifications

Technical details and manufacturing context for Phase-locked loop

Definition
Within a timing generator, the phase-locked loop (PLL) is a critical electronic circuit that synchronizes the phase and frequency of its output oscillator signal with a reference input signal. It ensures stable, precise clock generation, frequency synthesis, and jitter reduction for timing-sensitive operations.
Working Principle
The PLL compares the phase of a voltage-controlled oscillator (VCO) output with the phase of an input reference signal using a phase detector. The resulting error voltage is filtered and used to adjust the VCO frequency, driving the phase error toward zero and locking the output frequency to the reference.
Common Materials
Semiconductor (Silicon)
Technical Parameters
  • Lock range, capture range, and output frequency stability are critical specifications. (Hz) Per Request
Components / BOM
  • Phase Detector
    Compares the phase difference between the input reference signal and the feedback signal from the VCO, producing an error voltage.
    Material: Semiconductor
  • Loop Filter
    Filters the error voltage from the phase detector to remove high-frequency noise and shape the loop dynamics, providing stability.
    Material: Passive components (Resistors, Capacitors)
  • Voltage-Controlled Oscillator (VCO)
    Generates the output signal whose frequency is controlled by the filtered error voltage from the loop filter.
    Material: Semiconductor
  • Frequency Divider
    Divides the VCO output frequency to provide feedback for comparison with the reference, enabling frequency multiplication.
    Material: Semiconductor

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Phase-locked loop.

high-frequency phase-locked loop circuit silicon semiconductor PLL design voltage-controlled oscillator synchronization phase detector loop filter integration optical manufacturing signal timing control

Applied To / Applications

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

Timing generator
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Clock Management Unit
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Frequency Converter
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Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: N/A (electronic component, not fluid handling)
other spec: Frequency range: 1 Hz to 10 GHz (varies by model), Supply voltage: 1.8V to 5V, Phase noise: -80 dBc/Hz to -150 dBc/Hz at offset
temperature: -40°C to +125°C (typical industrial range)
Media Compatibility
✓ Digital communication systems ✓ Frequency synthesizers ✓ Clock recovery circuits
Unsuitable: High-vibration mechanical environments without proper mounting/shock absorption
Sizing Data Required
  • Reference frequency input (Hz)
  • Desired output frequency range (Hz)
  • Required phase noise performance (dBc/Hz)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Phase Lock Failure
Cause: Voltage-controlled oscillator (VCO) drift due to temperature variations or aging components causing loss of synchronization with reference signal
Jitter Accumulation
Cause: Noise in the loop filter or reference clock leading to timing errors and degraded signal integrity
Maintenance Indicators
  • Audible high-frequency whine or erratic output signal
  • Visual indicator (LED) showing loss of lock or unstable frequency display
Engineering Tips
  • Implement temperature compensation circuits and use high-stability reference oscillators to minimize VCO drift
  • Regularly calibrate loop filter components and maintain clean power supply to reduce noise-induced jitter

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 Quality management systems - Requirements ANSI/ESD S20.20-2021 Electrostatic Discharge Control Program IEC 61000-4-3 Electromagnetic compatibility (EMC) - Testing and measurement techniques
Manufacturing Precision
  • Frequency stability: +/- 0.5 ppm over operating temperature range
  • Phase noise: -100 dBc/Hz at 10 kHz offset from carrier
Quality Inspection
  • Phase margin and stability analysis via Bode plot measurement
  • Jitter measurement using spectrum analyzer or dedicated jitter analyzer

Factories Producing Phase-locked loop

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the primary function of a phase-locked loop in electronic manufacturing?

A phase-locked loop synchronizes an output signal's phase with an input reference signal, ensuring precise timing and frequency stability in computer, electronic, and optical systems.

How does the voltage-controlled oscillator (VCO) component work in a PLL?

The VCO generates an output signal whose frequency is controlled by an input voltage from the loop filter, allowing the PLL to adjust and lock onto the reference signal's phase.

Why are silicon semiconductors preferred for phase-locked loop manufacturing?

Silicon semiconductors offer excellent thermal stability, high-frequency performance, and cost-effective integration, making them ideal for reliable PLL circuits in industrial applications.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Computer, Electronic and Optical Product Manufacturing.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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