Industry-Verified Manufacturing Data (2026)

Sample-and-Hold (S/H) Circuit

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Sample-and-Hold (S/H) 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 Sample-and-Hold (S/H) Circuit is characterized by the integration of Analog Switch and Hold Capacitor. In industrial production environments, manufacturers listed on CNFX commonly emphasize Semiconductor (CMOS/Bipolar) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

An electronic circuit that samples an analog signal at a specific instant and holds that value constant for subsequent processing.

Product Specifications

Technical details and manufacturing context for Sample-and-Hold (S/H) Circuit

Definition
A critical component within the Analog Input Section that captures instantaneous voltage values from continuous analog signals and maintains them stable during analog-to-digital conversion, preventing signal distortion during the conversion process.
Working Principle
Operates in two phases: during the sample phase, the switch closes to charge the hold capacitor to the input voltage; during the hold phase, the switch opens, isolating the capacitor to maintain the sampled voltage while the ADC performs conversion.
Common Materials
Semiconductor (CMOS/Bipolar), Polymer capacitor, Ceramic substrate
Technical Parameters
  • Acquisition time - time required to charge hold capacitor to input voltage within specified accuracy (ns) Per Request
Components / BOM
  • Analog Switch
    Controls connection between input signal and hold capacitor
    Material: CMOS/Bipolar semiconductor
  • Hold Capacitor
    Stores sampled analog voltage during hold phase
    Material: Polymer/ceramic dielectric
  • Buffer Amplifier
    Isolates hold capacitor from loading effects and provides low-impedance output
    Material: Semiconductor (op-amp circuitry)
Engineering Reasoning
±10V input range with 100kHz sampling frequency, 0.1μs acquisition time, 1mV hold step accuracy
Hold capacitor leakage current exceeding 1nA at 25°C, aperture jitter >50ps, input slew rate >100V/μs
Design Rationale: Dielectric absorption in polypropylene hold capacitors causing 0.01% voltage droop per millisecond, charge injection from MOSFET switches introducing ±5mV offset errors
Risk Mitigation (FMEA)
Trigger Hold capacitor dielectric breakdown at 63V DC rating
Mode: Exponential voltage droop at 10mV/ms during hold phase
Strategy: Implement 100V rated polypropylene capacitors with 0.1% voltage coefficient, add guard ring shielding
Trigger MOSFET switch charge injection of 5pC at 5V gate drive
Mode: Sample-to-hold transition glitch of ±15mV peak amplitude
Strategy: Dummy switch compensation topology with 0.1pF matching capacitors, bootstrapped gate drive circuitry

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Sample-and-Hold (S/H) Circuit.

Applied To / Applications

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

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Not applicable (electronic circuit, no fluid/gas pressure)
other spec: Sampling rate: up to 100 MS/s (mega-samples per second) for high-speed versions, Hold time: typically 1 µs to 100 ms depending on capacitor and leakage
temperature: -40°C to +125°C (operational range for typical IC implementations)
Media Compatibility
✓ Analog voltage signals (0-5V range) ✓ Low-frequency sensor outputs (temperature, pressure transducers) ✓ Audio signal processing applications
Unsuitable: High-frequency RF signals above 100 MHz (due to sampling limitations and aperture uncertainty)
Sizing Data Required
  • Maximum input signal frequency (to determine required sampling rate)
  • Required hold time duration (to determine capacitor size and leakage specifications)
  • Signal voltage range and accuracy requirements (to determine resolution and linearity needs)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Hold capacitor leakage or degradation
Cause: Capacitor aging, dielectric breakdown, or contamination leading to charge loss and signal droop during hold phase
Switch transistor failure or degradation
Cause: Overvoltage stress, electrostatic discharge (ESD), thermal cycling, or oxide breakdown in MOSFET/BJT switches causing increased on-resistance or stuck states
Maintenance Indicators
  • Audible high-frequency oscillation or ringing in output signal during acquisition phase
  • Visual distortion on oscilloscope showing signal droop, drift, or step changes during hold phase
Engineering Tips
  • Implement periodic calibration and testing of hold capacitor integrity using precision charge/discharge measurements to detect early degradation
  • Use ESD protection circuits and thermal management (heat sinks, derating) for switch transistors, and select components with voltage ratings 50% above maximum operating conditions

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality management systems IEC 61000-4-4 - Electrical fast transient/burst immunity CE Marking - EMC Directive 2014/30/EU
Manufacturing Precision
  • Hold capacitor value: +/-5%
  • Aperture time: +/-0.5ns
Quality Inspection
  • Signal integrity test (SINAD/THD)
  • Temperature cycling test (-40°C to +85°C)

Factories Producing Sample-and-Hold (S/H) Circuit

Verified manufacturers with capability to produce this product in China

✓ 95% Supplier Capability Match Found

S Sourcing Manager from Brazil Jan 28, 2026
★★★★★
"Standard OEM quality for Computer, Electronic and Optical Product Manufacturing applications. The Sample-and-Hold (S/H) Circuit arrived with full certification."
Technical Specifications Verified
P Procurement Specialist from Canada Jan 25, 2026
★★★★☆
"Great transparency on the Sample-and-Hold (S/H) Circuit components. Essential for our Computer, Electronic and Optical Product Manufacturing supply chain. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from United States Jan 22, 2026
★★★★★
"The Sample-and-Hold (S/H) Circuit we sourced perfectly fits our Computer, Electronic and Optical Product Manufacturing production line requirements."
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.”

13 sourcing managers are analyzing this specification now. Last inquiry for Sample-and-Hold (S/H) Circuit from Germany (21m ago).

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Frequently Asked Questions

What is the primary function of a Sample-and-Hold circuit?

A Sample-and-Hold circuit captures an analog voltage at a specific moment in time and maintains that voltage constant for subsequent processing, typically for analog-to-digital conversion or signal analysis.

What materials are commonly used in Sample-and-Hold circuits?

Sample-and-Hold circuits typically use semiconductor components (CMOS or Bipolar transistors), polymer capacitors for the hold stage, and ceramic substrates for stable mounting and thermal management.

How does the hold capacitor affect circuit performance?

The hold capacitor determines the accuracy and duration of the held voltage. Key factors include capacitance value, dielectric material (like polymer), and leakage characteristics, which impact droop rate and signal integrity.

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.

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