File No. 642 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _~ __
rnOBLJD
Solid State Division
Power Transistors IRCA1C10 IRCA1C11
Silicon Transistors for 12-Watt True-Complementary-Symmetry Audio Amplifiers
JEOEC TO-220AB
H-1535Rl
RCA lCl0 and RCA lCll are n-p-n and p-n-p epitaxial-base silicon power transistors, respectively, especially characterized for audio-output service. To enhance circuit economics, they are provided in the JEDEC TO-220AB version of the VERSAWATT plastic package.
The 12-watt audio-amplifier circuit shown in Figs. 1 and 7 uses RCA lCl0 and RCA lCll as output devices in conjunction with three discrete transistors, two diodes, and a ..single 36-volt power supply; the amplifier output is capacitively coupled to an B-ohm speaker. The choice of a true-complementary-symmetry output stage provides excellent fidelity for a low-cost system.
The 12-watt amplifier circuit shown in Figs. 2 and 10 uses
RCA lCl 0 and RCA lCll discrete transistors, an integra.