Industry-Verified Manufacturing Data (2026)

Phase-Locked Loop (PLL) Circuit

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Phase-Locked Loop (PLL) Circuit 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 (PLL) Circuit 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.

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

View Full Specifications Explore Manufacturing Sources

Product Specifications

Technical details and manufacturing context for Phase-Locked Loop (PLL) Circuit

Definition
A critical component within a Clock Generator system that synchronizes the phase and frequency of an output oscillator signal with a reference input signal, enabling precise clock generation, frequency synthesis, and signal recovery in electronic devices.
Working Principle
The PLL circuit compares the phase of a voltage-controlled oscillator (VCO) output with an input reference signal using a phase detector. Any phase difference generates an error voltage that is filtered and applied to the VCO, adjusting its frequency until the output phase locks to the reference phase, achieving synchronization.
Common Materials
Semiconductor (Silicon)
Technical Parameters
  • Lock range or capture range - the frequency range over which the PLL can achieve and maintain phase lock. (Hz) Per Request
Components / BOM
  • Phase Detector
    Compares the phase difference between the reference input and the feedback signal, generating an error voltage proportional to the phase difference.
    Material: semiconductor
  • Loop Filter
    Filters the error voltage from the phase detector to remove high-frequency components and noise, providing a stable control voltage to the VCO.
    Material: passive components (resistors, capacitors)
  • Voltage-Controlled Oscillator (VCO)
    Generates the output signal whose frequency is controlled by the voltage from the loop filter.
    Material: semiconductor
  • Frequency Divider
    Divides the VCO output frequency to match the reference frequency, enabling frequency multiplication and synthesis (often part of the feedback path).
    Material: semiconductor
Engineering Reasoning
0.5-5.0 GHz with 1.0-3.3 V supply voltage, -40°C to +125°C ambient temperature
Phase error exceeding ±15° or lock loss when reference signal jitter exceeds 100 ps RMS
Design Rationale: VCO gain nonlinearity exceeding 2% deviation from linear characteristic causes phase detector saturation at 0.8×VDD
Risk Mitigation (FMEA)
Trigger Power supply noise exceeding 50 mVpp at 100 MHz
Mode: Reference clock jitter injection causing 12 dB phase noise degradation
Strategy: On-die LDO regulator with 30 dB PSRR at 100 MHz and π-filter decoupling network
Trigger Thermal gradient of 40°C/mm across die substrate
Mode: VCO frequency drift of 150 ppm/°C causing loss of lock at 2.5 GHz operation
Strategy: Thermal symmetry layout with 8-way interdigitated VCO core and substrate backside thermal vias

Industry Taxonomies & Aliases

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

low jitter PLL circuit design voltage-controlled oscillator frequency stability phase detector synchronization accuracy semiconductor PLL for optical systems loop filter noise reduction techniques

Applied To / Applications

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

Clock Generator
View system integration details

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
voltage: 1.8V to 5.5V (supply voltage range)
frequency: 1 MHz to 3 GHz (operating frequency range)
phase noise: -100 dBc/Hz at 1 MHz offset (typical specification)
temperature: -40°C to +125°C (typical industrial range)
Media Compatibility
✓ Digital communication systems ✓ Frequency synthesizers ✓ Clock generation circuits
Unsuitable: High-vibration mechanical environments without proper mounting
Sizing Data Required
  • Reference frequency input
  • Desired output frequency
  • Required phase noise performance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Phase lock loss
Cause: Voltage-controlled oscillator (VCO) drift due to temperature fluctuations, aging components, or power supply noise exceeding the loop's capture range
Reference signal injection locking
Cause: External electromagnetic interference (EMI) or poor shielding coupling spurious signals into the phase detector, causing the PLL to lock onto incorrect frequencies
Maintenance Indicators
  • Audible: Intermittent or constant high-pitched whining or buzzing from the circuit area, indicating VCO instability or oscillation at unintended frequencies
  • Visual: Oscilloscope readings showing excessive phase jitter, frequency drift beyond specifications, or failure to achieve lock during startup sequences
Engineering Tips
  • Implement active thermal management with heat sinks or Peltier coolers on the VCO and phase detector ICs to minimize temperature-induced frequency drift
  • Use EMI shielding cans around sensitive components and implement power supply decoupling with low-ESR capacitors near all IC power pins to reduce noise injection

Compliance & Manufacturing Standards

Reference Standards
IEC 60747-14-1: Semiconductor devices - Part 14-1: Semiconductor sensors - General specifications and test methods ISO 9001:2015 Quality management systems - Requirements CE marking per EU EMC Directive 2014/30/EU for electromagnetic compatibility
Manufacturing Precision
  • Frequency stability: +/- 0.5% over operating temperature range
  • Phase noise: -100 dBc/Hz at 10 kHz offset from carrier
Quality Inspection
  • Jitter measurement test for timing accuracy verification
  • Power supply rejection ratio (PSRR) test for noise immunity

Factories Producing Phase-Locked Loop (PLL) Circuit

Verified manufacturers with capability to produce this product in China

Add your factory

✓ 98% Supplier Capability Match Found

P Procurement Specialist from Singapore Jan 07, 2026
★★★★★
"Testing the Phase-Locked Loop (PLL) Circuit now; the technical reliability results are within 1% of the laboratory datasheet."
Technical Specifications Verified
T Technical Director from Germany Jan 04, 2026
★★★★★
"Impressive build quality. Especially the technical reliability is very stable during long-term operation."
Technical Specifications Verified
P Project Engineer from Brazil Jan 01, 2026
★★★★★
"As a professional in the Computer, Electronic and Optical Product Manufacturing sector, I confirm this Phase-Locked Loop (PLL) Circuit meets all ISO standards."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

17 sourcing managers are analyzing this specification now. Last inquiry for Phase-Locked Loop (PLL) Circuit from UAE (1h ago).

Supply Chain Compatible Machinery & Devices

Industrial Smart Camera Module

Embedded vision system for industrial automation and quality inspection.

Explore Specs →
Industrial Wireless Power Transfer Module

Wireless power transfer module for industrial equipment applications

Explore Specs →
Industrial Smart Sensor Module

Modular industrial sensor with embedded processing and wireless connectivity

Explore Specs →
Surface Mount Resistor

Passive electronic component for current limiting and voltage division in circuits

Explore Specs →

Frequently Asked Questions

What are the primary applications of PLL circuits in computer manufacturing?

PLL circuits are essential for clock generation, frequency synthesis, and data recovery in processors, memory systems, and communication interfaces, ensuring precise timing synchronization across electronic components.

How does the loop filter improve PLL performance?

The loop filter reduces noise and ripple from the phase detector output, stabilizing the control voltage to the VCO. This minimizes jitter and phase errors, critical for high-speed digital and optical systems.

What factors affect the lock range and stability of a PLL circuit?

Lock range and stability depend on VCO gain, phase detector sensitivity, loop filter bandwidth, and component tolerances. Proper design ensures reliable operation across temperature variations and supply voltage changes.

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 Specifications verified by CNFX Industrial Index (v2.6.03) for Computer, Electronic and Optical Product Manufacturing sector.

Get Quote for Phase-Locked Loop (PLL) Circuit

Request technical pricing, lead times, or customized specifications for Phase-Locked Loop (PLL) Circuit directly from verified manufacturing units.

Your business information is encrypted and only shared with verified Phase-Locked Loop (PLL) Circuit suppliers.

Thank you! Your message has been sent. We'll respond within 1–3 business days.
Thank you! Your message has been sent. We'll respond within 1–3 business days.

Need to Manufacture Phase-Locked Loop (PLL) Circuit?

Connect with verified factories specializing in this product category

Add Your Factory Contact Us
Previous Product
Phase-Locked Loop (PLL)
Next Product
Photocoupler Assembly