96 kHz Sampling Rate Converter
for high-end digital audio
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Materials
Gerber file
CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.
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Component list
R1,R16,R18 = 75Ohm
R2 = 5kOhm 1, SMD (Farnell # 771-429, case size 0805)
R3 = see text
R4-R7 = 47kOhm
R8 = 2Ohm 2
R9-R12 = 47Ohm
R13 = 4Ohm 7
R14 = 8kOhm 2
R15,R17 = 270Ohm
R19 = 100kOhm
R20 = 1MOhm
R21,R22,R23 = 1kOhm
R24 = 3kOhm 9
R25 = 1Ohm 5
Capacitors:
C1,C2 = 10nF ceramic
C3 = 82nF, SMD, (Farnell # 301-9550, dielectric X7R, case size 0603)
C4 = 2nF2, SMD (Farnell # 578-290, dielectric NPO, case size 0805)
C5,C8 = 1nF, SMD (Farnell # 301-9380, dielectric X7R, case size 0402)
C6,C9 = 100nF, SMD (Farnell # 432-210, dielectric X7R, case size 0603)
C7,C10 = 1µF, SMD (Farnell # 317-627, dielectric NP0, case size 0805)
C11,C13,C15,C16,C19,C25,C26,C28 = 100nF ceramic
C12,C14,C24 = 100µF 10V radial
C17,C18 = 47nF, MKT (Siemens, Electrovalue)
C20,C21 = 33pF
C22 = 27pF
C23 = 100pF
C27 = 10µF 63V radial
C29 = 1000µF 25V radial
C30-C33 = 22nF, ceramic
Inductors:
L1,L3 = 10 µH
L2 = 47µH
L4 = 1.5µ H or 1.8 µH (see text)
Semiconductors:
B1 = B80C1500 (rectangular case, 80V piv, 1.5A peak)
D1,D5 = high-efficiency LED, red
D2 = high-efficiency LED, yellow/amber
D3 = high-efficiency LED, green
D4 = zener diode 5.6V, 1.3W
IC1 = CS8420-CS (Crystal, 28-pin SOIC; Atlantik Elektronik, Germany)
IC2 = TORX173 Toshiba (Conrad Electronics)
IC3 = TOTX173 Toshiba (Conrad Electronics)
IC4 = 74HCU04
IC5 = 74HC14
IC6 = 7805
Miscellaneous:
JP1,JP2 = 3-way pinheader + jumper
JP3 = 2-way pinheader + jumper
K1,K2,K3 = RCS (line) socket, PCB mount, (e.g. Monacor/Monarch type T-709G)
K4 = 16-way straight boxheader
K5,K6 = 2-way PCB terminal block, lead pitch 7.5 mm
X1 = 24.576 MHz quartz crystal (Cload = 20 pF, parallel resonance)
F1 = fuse, 32 mAT (time lag) +PCB mount fuse holder
Tr1 = ferrite core, Philips type TN/7,5/5-3E25, primary 20 turns, secondary 2x2 turns ECW 0.5 mm dia. ( 26 SWG)
Tr2 = mains transformer
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