PCBA Images

About TECircuit

Found: TECircuit has been operating since 2004.

Location: An electronics manufacturing service(EMS) provider located in Shenzhen China.

Item: Customizable EMS PCB, offers a full range of one-stop shop services.

Service: Printed Circuit Board (PCB)and Printed Circuit Board Assembly(PCBA), Flexible Printed Circuit Board(FPC), Components Sourcing, Box-Building, Testing.

Quality Assurance: UL,ISO 9001, ISO 14001, ISO 13485, ITAF 16949 andcomplied with ROHS and REACH.

Factory Pictures:
Company's own plant : 50,000 sqm; Employees : 930+; Monthly production capacity : 100,000 m2

PCBA Applications

• Vinyl Record Playback Systems: The PCBA serves as the critical interface between turntables and audio systems, amplifying and equalizing the minute signals from magnetic cartridges to line-level for proper playback through amplifiers and speakers.

• High-Fidelity Audio Chains: It enables the integration of turntables into modern and vintage audiophile systems by providing accurate RIAA equalization and sufficient signal gain while maintaining the purity of the analog audio signal.

• Record Archiving and Digital Conversion: The PCBA facilitates the transfer of vinyl recordings to digital formats by delivering properly equalized and amplified signals to analog-to-digital converters for preservation and streaming purposes.

• Professional DJ Setups: Supports DJ performances by providing robust, low-noise amplification that maintains signal integrity during scratch performances and mixing, while offering multiple input options for different turntable types.

• Custom Audio System Integration: Allows hobbyists and audio engineers to build customized phono stages with specific sonic characteristics through component selection and circuit modifications on the PCBA.

• MM/MC Cartridge Compatibility: Advanced PCBAs incorporate switching systems and adjustable loading circuits to support both Moving Magnet (MM) and Moving Coil (MC) cartridges with appropriate gain stages and impedance matching.

PCBA Features

1. RIAA Equalization Precision: The PCBA implements exact RIAA equalization curves through precisely matched resistor-capacitor networks, typically achieving tolerance within ±0.2dB to ensure accurate frequency response reproduction from vinyl records.

2. Ultra-Low Noise Amplification: Incorporates specialized low-noise operational amplifiers or discrete transistor arrays with careful PCB layout techniques to minimize hum, hiss, and electromagnetic interference that could compromise audio quality.

3. Dual Power Supply Architecture: Utilizes symmetrical positive and negative voltage rail design with sophisticated voltage regulation to provide clean, stable power to amplification stages, minimizing distortion and improving dynamic range.

4. Impedance Loading Options: Includes user-selectable impedance and capacitance settings through dip-switches or jumper blocks to properly match various cartridge specifications and optimize performance.

5. Ground Loop Isolation: Implements star-grounding techniques and dedicated ground plane management in the PCB layout to prevent hum and buzz caused by ground loops in complex audio systems.

6. Modular Input Stage Design: Features separate, optimized amplification pathways for MM and MC cartridges, with MC stages incorporating additional gain (typically 20-30dB extra) and lower noise figures for low-output moving coil designs.

7. Shielding and RF Suppression: Employs strategic component placement, grounded shields, and RF filtering at input stages to prevent radio frequency interference from affecting the sensitive high-gain amplification circuitry.

FAQ

​PCB & PCBA Description​

PCB Assembly OEM Service

Electronic Components Material Purchasing

Bare PCB Fabrication

Cable, Wire-harness Assembly, Sheet Metal, Electrical Cabinet Assembly Service

PCB Assembly Service: SMT, BGA, DIP

PCBA test: AOI, In-Circuit Test (ICT), Functioal Test (FCT)

Conformal Coating Service

Prototyping and Mass Production

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PCBA ODM service

PCB Layout, PCBA Design According To Your Idea

PCBA Copy/Clone

Digital Circuit Design / Analog Circuit Design/ lRF Design /Embedded Software Design

Firmware and Microcode Programming Windows Application (GUI) Programming/Windows Device Driver (WDM) Programming

Embedded User Interface Design / lSystem Hardware Design

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