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Audio projects

We have been involved in a variety of audio related projects that included audio power and preamplifiers, signal processors and musical sound effects. Some of the components of those systems were rather of universal nature and they eventually evolved into separate products that can be useful for a number of different applications.

High Fidelity Audio Analog-to-Digital Converter

Product Specifications:

Audio input: Stereo, standard line level
Max audio input (Full scale): 1.38V RMS (+5dBu)
Input impedance: 10 Kohm
Audio frequency range: 20 Hz to 20 kHz
Sampling rate: 48 kHz
ADC resolution: 24-bit
Dynamic range: 103dB (Typically)
Power input: 6VDC, 50mA
Digital output: 1 Vp-p, balanced
Output impedance: 110 ohms (differential)
Capable of driving CAT5 or CAT6 twisted pair cable or similar transmission medium
Size: 1.62 X 1.02 inches




High Fidelity Audio Digital-to-Analog Converter

Product Specifications:

Digital input: balanced CAT5, 6 twisted pair cable or similar transmission medium
Digital input sensitivity: 150 mV (differential, typical)
Input impedance: 110 ohms
Sampling rate: 48 kHz
DAC resolution: 24-bit
Audio output: Stereo, standard line level
Max audio output (Full scale): 1.38V RMS (+5dBu)
Output impedance: 600 ohms
Min output load: 5 Kohm
Audio frequency range: 20 Hz to 20 kHz
Dynamic range: 106dB (Typically, 20Hz-20KHz)
Power input: 6VDC, 50mA
Size: 1.62 X 1.02 inches




Applications

The complimentary A-to-D and D-to-A converters have been originally designed to facilitate Hi-Fi audio signal transmission by means of wireless or wired (twisted pair cable) medium to a remote location. They help to eliminate the interference problems related to analog transmission lines. Adding D-to-A converter to a traditional audio system will provide it with a digital input for direct communication with a digital audio source according to EIAJ CP1201, IEC-60958, AES3 or S/PDIF standards.












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