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INTRODUCTION
OF
MONOLITHICK
IC
The Equalizer Circuit of SS-7000A uses IC (shown in the Circuit Diagram 1C401 AN-204).
Please read through the
following explanation and make the best use of it.
General
Theory
of IC
MIC (Integrated Circuit)
Since Texas Instruments, USA, developed know how to make transistors, diodes, resistors, capacitors, etc. on a minute
single base plate in 1958, this technique is widely applied to electric appliances.
M Classifications
by manufacturing
method
of IC
-—Monolithic Type
—Semiconductor IC —
'—-Multi-tip Type
IC
Hybrid IC
-—Thin Film IC
Film IC
\_Thick Film IC
@ Advantages
of iC
1) Compactness and light weight.
2) Small electric consumption.
3) Low cost if mass-produced.
4) High reliability
5) Fewer manufacturing processes needed.
6) Simple procedure to make the intricate circuit.
MONOLITHIC
TYPE
SEMICONDUCTOR
IC
. The Semiconductor IC consists of a number of transistors, diodes, resistors and capacitors combined
together on a
silicon base plate of about 1 mm square.
It is manufactured by use of photographic technology.
m@ IC AN-204 (For Model SS-7000A)
AN-204 is a monolithic type semiconductor IC for low-frequency
amplification, developed by Matsushita Electronics
Corporation.
10 transistors, 6 diodes, 10 resistors and 2 capacitors are built in one chip, and 12 feet are attached
to the IC.
Makes no loud noise and shows high loop gain.
When used for an MM cartridge equalizer circuit, it helps attain a
sufficient amount of feedback gain.
It, therefore, constitutes a stable cartridge equalizing circuit almost free
distortion.
,
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