Industry-Verified Manufacturing Data (2026)

Demodulator

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Demodulator 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 Demodulator is characterized by the integration of Mixer / Multiplier and Local Oscillator. In industrial production environments, manufacturers listed on CNFX commonly emphasize Semiconductor (Silicon, Gallium Arsenide) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

Electronic circuit that extracts the original information-bearing signal from a modulated carrier wave.

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Product Specifications

Technical details and manufacturing context for Demodulator

Definition
A demodulator is a critical component within a receiver circuit that performs the inverse function of a modulator. It recovers the original baseband signal (such as audio, video, or data) from a modulated radio frequency (RF) or intermediate frequency (IF) carrier wave, enabling the information to be processed, amplified, or converted for output.
Working Principle
The demodulator operates by reversing the modulation process applied at the transmitter. For amplitude modulation (AM), it typically uses envelope detection or synchronous detection to recover the signal's amplitude variations. For frequency modulation (FM), it uses a frequency discriminator or phase-locked loop (PLL) to convert frequency variations back into voltage variations. The specific circuit (e.g., diode detector, product detector, quadrature detector) depends on the modulation scheme (AM, FM, PM, QAM, etc.).
Common Materials
Semiconductor (Silicon, Gallium Arsenide), Ceramic Substrate, Copper, Solder
Technical Parameters
  • Operating frequency range of the carrier signal the demodulator is designed to process. (MHz) Standard Spec
Components / BOM
  • Mixer / Multiplier
    Combines the incoming modulated signal with a local oscillator signal to produce sum and difference frequencies, a key step in synchronous detection.
    Material: Semiconductor
  • Local Oscillator
    Generates a stable reference signal at the carrier frequency (or a related frequency) required for the demodulation process.
    Material: Quartz Crystal, Semiconductor
  • Low-Pass Filter
    Removes high-frequency components (like the carrier and its harmonics) after mixing, leaving only the recovered baseband signal.
    Material: Resistors, Capacitors, Inductors
Engineering Reasoning
0.1-2.4 GHz, -40 to +85°C, 3.3-5.0 VDC
Input power > +10 dBm causes mixer compression, junction temperature > 125°C triggers thermal runaway
Design Rationale: Schottky diode junction breakdown at reverse bias > 5 V, semiconductor lattice damage from hot carrier injection at > 150°C
Risk Mitigation (FMEA)
Trigger Local oscillator phase noise > -80 dBc/Hz at 10 kHz offset
Mode: Signal-to-noise ratio degradation below 15 dB in recovered baseband
Strategy: Implement phase-locked loop with 100 ppm crystal reference and 40 dB phase noise suppression
Trigger DC blocking capacitor ESR > 0.5 Ω at 1.8 GHz
Mode: Quadrature phase error > 5° causing image frequency interference
Strategy: Use 0402-size ceramic capacitors with X7R dielectric and < 0.1 Ω ESR at operating frequency

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Demodulator.

high-frequency signal demodulator circuit semiconductor-based demodulator for optical products demodulator with gallium arsenide mixer low-pass filter demodulator for electronic manufacturing carrier wave signal extraction demodulator

Applied To / Applications

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

Receiver Circuit
View system integration details

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: N/A (electronic component)
other spec: Carrier Frequency Range: 1 MHz to 2.4 GHz, Input Signal Level: -30 dBm to +10 dBm
temperature: -40°C to +85°C
Media Compatibility
✓ RF communication systems ✓ Satellite signal processing ✓ Digital broadcasting equipment
Unsuitable: High-voltage power transmission environments
Sizing Data Required
  • Carrier frequency range
  • Modulation type (AM/FM/PM/QAM)
  • Required signal-to-noise ratio (SNR)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Signal drift
Cause: Component aging or thermal instability in oscillators and filters leading to frequency/phase deviation
Demodulation failure
Cause: Local oscillator malfunction or mixer degradation causing loss of carrier recovery and signal extraction
Maintenance Indicators
  • Intermittent or distorted output signal audible through monitoring equipment
  • Abnormal heating or thermal patterns detected on RF components during operation
Engineering Tips
  • Implement regular calibration and alignment checks using signal generators and spectrum analyzers to maintain optimal performance
  • Maintain stable environmental conditions with proper cooling and vibration isolation to prevent thermal and mechanical stress on sensitive components

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 Quality management systems - Requirements CE Marking (EU) - Electromagnetic Compatibility Directive 2014/30/EU IEC 60793-1-1:2022 Optical fibres - Part 1-1: Measurement methods and test procedures - General and guidance
Manufacturing Precision
  • Frequency Stability: +/- 0.5 ppm over operating temperature range
  • Phase Noise: -110 dBc/Hz at 10 kHz offset from carrier
Quality Inspection
  • Bit Error Rate (BER) Test under varying signal-to-noise conditions
  • Spurious Emission Test per FCC/ETSI regulatory limits

Factories Producing Demodulator

Verified manufacturers with capability to produce this product in China

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✓ 97% Supplier Capability Match Found

P Project Engineer from Canada Jan 17, 2026
★★★★★
"Impressive build quality. Especially the technical reliability is very stable during long-term operation."
Technical Specifications Verified
S Sourcing Manager from United States Jan 14, 2026
★★★★★
"As a professional in the Computer, Electronic and Optical Product Manufacturing sector, I confirm this Demodulator meets all ISO standards."
Technical Specifications Verified
P Procurement Specialist from United Arab Emirates Jan 11, 2026
★★★★★
"Standard OEM quality for Computer, Electronic and Optical Product Manufacturing applications. The Demodulator arrived with full certification."
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.”

11 sourcing managers are analyzing this specification now. Last inquiry for Demodulator from UAE (46m ago).

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Frequently Asked Questions

What materials are used in this demodulator's construction?

This demodulator utilizes semiconductor materials like Silicon and Gallium Arsenide, ceramic substrates for stability, copper for conductivity, and solder for component connections.

How does the demodulator extract the original signal from a carrier wave?

The demodulator uses a mixer/multiplier combined with a local oscillator to down-convert the modulated signal, then applies a low-pass filter to isolate and extract the original information-bearing signal.

What industries commonly use this type of demodulator?

This demodulator is designed for computer, electronic, and optical product manufacturing, where precise signal extraction from modulated carrier waves is essential for communication and data processing systems.

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.

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