---
title: "Automatic Gain Control (AGC)"
industry: "Computer, Electronic and Optical Product Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:AUTOMATIC_GAIN_CONTROL_AGC"
  data_integrity_hash: "07d6456a687303088a7d7ab8bee28e71"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:AUTOMATIC_GAIN_CONTROL_AGC"
  data_source_uri: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/automatic-gain-control-agc.md"
  official_resource_url: "https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/automatic-gain-control-agc"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "Input signal strength: -80 dBm to -20 dBm, Output level: 1 Vrms ±0.1 Vrms"
    unit: "dB"
engineering_limits:
  max_safe_operating_point:
    value: 90
    unit: "dBm"
    consequence: "Amplifier saturation due to MOSFET channel pinch-off at Vds &gt; 2.7 V, causing harmonic distortion exceeding 3% THD"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Power supply voltage drop below 2.8 VDC"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Implement brown-out detection circuit with 2.9 V threshold and controlled shutdown sequence"
  - node_2:
      trigger: "RF input exceeding -5 dBm for &gt;100 ms duration"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integrate directional coupler with -10 dB tap and PIN diode limiter with 5 ns response time"
bom_nodes:
  detector:
    type: "part"
    urn: "URN:CNFX:ME:DETECTOR"
    interface_type: "physical-logic-coupled"
  reference-voltage-source:
    type: "part"
    urn: "URN:CNFX:ME:REFERENCE_VOLTAGE_SOURCE"
    interface_type: "physical-logic-coupled"
  error-amplifier:
    type: "component"
    urn: "URN:CNFX:ME:ERROR_AMPLIFIER"
    interface_type: "physical-logic-coupled"
  variable-gain-amplifier-vga:
    type: "part"
    urn: "URN:CNFX:ME:VARIABLE_GAIN_AMPLIFIER_VGA"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/automatic-gain-control-agc.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "901a069143e7eb38c821b82b0b4369276543dc5d05bd7c072a50140bc2439007"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Automatic Gain Control (AGC)

## 1. Technical Definition
Electronic circuit that automatically adjusts the gain of a receiver to maintain a constant output signal level despite variations in input signal strength.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **Input signal strength: -80 dBm to -20 dBm, Output level: 1 Vrms ±0.1 Vrms**. Failure boundary: **Input signal strength below -90 dBm causes noise floor dominance, above -10 dBm causes amplifier saturation at 3.3 V supply rail**, Mechanism: **Amplifier saturation due to MOSFET channel pinch-off at Vds &gt; 2.7 V, causing harmonic distortion exceeding 3% THD**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Power supply voltage drop below 2.8 VDC | 8 | AGC loop instability causing 15 dB gain oscillation at 1 kHz frequency | Implement brown-out detection circuit with 2.9 V threshold and controlled shutdown sequence |
| RF input exceeding -5 dBm for &gt;100 ms duration | 8 | Front-end LNA thermal runaway with junction temperature exceeding 150°C | Integrate directional coupler with -10 dB tap and PIN diode limiter with 5 ns response time |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | dB | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Detector](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/detector.md) `(Standalone System)`
- [Reference Voltage Source](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/reference-voltage-source.md) `(Standalone System)`
- [Variable Gain Amplifier (VGA)](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/variable-gain-amplifier-vga.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Signal Generator**, **Oscilloscope**, **Power Supply Unit**  
**Downstream Applications**: Radio Receivers, Telecommunication Equipment, Medical Imaging Devices  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What is the primary function of an Automatic Gain Control (AGC) circuit?
**A**: The AGC automatically adjusts receiver gain to maintain consistent output signal levels despite input signal strength variations, ensuring stable performance in electronic and optical systems.

### Q: What materials are used in manufacturing AGC circuits?
**A**: AGC circuits are primarily manufactured using semiconductor silicon, which enables precise control, miniaturization, and integration with other electronic components in computer and optical products.

### Q: What are the key components in an AGC Bill of Materials (BOM)?
**A**: Essential AGC components include a Detector to measure signal levels, Error Amplifier to compare signals, Reference Voltage Source for stability, and Variable Gain Amplifier (VGA) to adjust gain automatically.

## 6. Manufacturing Compliance

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Automatic Gain Control (AGC)](https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/automatic-gain-control-agc)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: AUTOMATIC_GAIN_CONTROL_AGC | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: a1dae459
