Output Buffer/Stage for Transmitters

Product Specifications

Technical details and manufacturing context for Output Buffer/Stage

Definition

The output buffer/stage is a critical component in a transmitter's signal chain, responsible for isolating the transmitter's core circuitry from the load (typically an antenna or transmission line), providing impedance matching, and ensuring signal integrity by preventing reflections and distortion during transmission. It receives a processed signal from preceding stages (e.g., modulator, amplifier), temporarily stores it in a buffer circuit to maintain signal stability, then drives it with sufficient power and proper impedance to the output port. This often involves amplification, filtering, and impedance transformation. The component is typically implemented using semiconductor materials such as silicon or gallium arsenide (GaAs), with copper interconnects, a ceramic substrate for thermal management, and a plastic housing for protection. Key electrical parameters include an output voltage swing of 0.5–3.3 V peak-to-peak into a 50 Ω load, an output impedance matched to 50 Ω, a bandwidth of 1–10 GHz at the -3 dB point, a rise time of 35–350 ps (20%–80%), a supply voltage of 3.3–5 V (single supply), a quiescent supply current of 10–50 mA, an operating temperature range of -40 to 85 °C, an input common-mode range of 0–2.5 V relative to ground, an output offset voltage of ±10 mV maximum, and ESD protection of ±2 kV (HBM) per IEC 61000-4-2. The component is offered in a 4×4 mm QFN-16 package. These values are directory reference ranges and must be confirmed for the specific model and application with the legal manufacturer or supplier. The output buffer/stage is essential for maintaining signal fidelity in high-speed communication systems, ensuring that the transmitted signal meets the required amplitude, timing, and impedance specifications.

Working Principle

The output buffer/stage operates by receiving a processed signal from preceding stages, such as a modulator or amplifier. It temporarily stores the signal in a buffer circuit to maintain stability, then drives it with sufficient power and proper impedance to the output port. This involves amplification to achieve the required voltage swing, filtering to shape the signal, and impedance transformation to match the 50 Ω transmission line. The buffer isolates the core circuitry from load variations, preventing reflections and distortion. The output stage ensures the signal meets specified parameters like bandwidth, rise time, and offset voltage, while operating within the given supply voltage and temperature range.

Common Materials

Semiconductor (Silicon/GaAs), Copper, Ceramic Substrate, Plastic Housing

Technical Parameters

Parameter	Typical range	Notes & selection driver
Output Voltage Swing	0.5–3.3 V	Peak-to-peak into 50 Ω load
Output Impedance	50 Ω	Matched to transmission line
Bandwidth	1–10 GHz	-3 dB point
Rise Time	35–350 ps	20%–80%
Supply Voltage	3.3–5 V	Single supply
Supply Current	10–50 mA	Quiescent
Operating Temperature	-40–85 °C	Ambient
Input Common-Mode Range	0–2.5 V	Relative to ground
Output Offset Voltage	±10 mV	Max
ESD Protection	±2 kV	HBMIEC 61000-4-2
Package Type	QFN-16	4×4 mm

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Buffer Amplifier
Isolates input from output and provides current gain

Material: Semiconductor
Impedance Matching Network
Matches output impedance to transmission line/antenna

Material: Copper, Ceramic
Heat Sink Part
Dissipates heat generated by power components

Material: Aluminum
Output Connector Part
Physical interface for connecting to transmission line

Material: Brass, Gold Plating
Output Filter
Shapes the outgoing waveform before it reaches the connector.

Applied To / Applications

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

Transmitter

View system integration details

Transmitter (TX) Driver

View system integration details

Manufacturers of Output Buffer/Stage

Manufacturer profiles associated with Output Buffer/Stage.

Sourcing Output Buffer/Stage from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

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

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Frequently Asked Questions

What is the typical output impedance of this output buffer/stage?

The output impedance is specified as 50 Ω, matched to a standard transmission line. This value is a reference range; confirm the exact impedance for your specific model with the manufacturer.

What is the operating temperature range?

The operating temperature range is -40 to 85 °C (ambient). This is a reference range; verify the actual limits for your application with the supplier.

Does the component include ESD protection?

Yes, the component is specified with ESD protection of ±2 kV (HBM) per IEC 61000-4-2. This standard is a verification reference; ensure the actual part meets your requirements.

What package is available?

The component is offered in a 4×4 mm QFN-16 package. Package availability may vary; confirm with the manufacturer.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

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.

Buyer enquiry

Request manufacturing insight for Output Buffer/Stage

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.

Where it goes: Straight to the CNFX editorial desk, and to the manufacturer if this product is linked to a claimed profile. Nothing is broadcast to a supplier list.
Your details stay here: We do not sell or rent enquiry data, and we do not add you to a mailing list. Used only to answer this request.
No commission, no middleman: CNFX is a directory. We take no cut of any order and never negotiate on a supplier's behalf.
What we don't claim: A listing is not an endorsement. Qualify every supplier and verify every figure yourself before ordering.

voltage:	1.8V to 5.5V supply range
impedance:	50 Ω standard (configurable)
temperature:	-40°C to +125°C
output current:	Up to 100 mA
signal frequency:	DC to 2 GHz

Output Buffer/Stage

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards