Category:Dolby HX Pro
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Impementation of adaptive biasing technology marketed by Dolby Laboratories since 1982  Typical implementation using the NEC uPC1297 integrated circuit | |||||
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The Dolby HX Pro was an adaptive dynamic biasing technology for cassette recorders, which purportedly allowed some extension of the maximum output level at treble frequencies. The original Dolby HX, presented in 1978, was a failure. The concept was further developed at Bang & Olufsen. Dolby Laboratories immediately purchased the rights to the B&O design and started marketing it as Dolby HX Pro. The earliest commercial designs used combinations of op amps and transconductance amps. In the second half of the 1980s NEC produced the uPC1297 dedicated integrated circuit, which became the industry standard for the Japanese manufacturers.
Media in category "Dolby HX Pro"
The following 8 files are in this category, out of 8 total.
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Dolby B-C HX Pro logo.svg 217 × 23; 9 KB
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Magnetization curve - adaptive biasing principle 03.svg 944 × 1,046; 196 KB
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Marantz SD-60 main audio PCB - NEC uPC1297 Dolby HX Pro IC.jpg 2,406 × 2,406; 1.23 MB
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NEC uPC1297 Dolby HX Pro IC.jpg 1,109 × 578; 172 KB
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Revox B215 - Dolby and B&O licensing credit statement.jpg 2,000 × 999; 576 KB
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Technics RS-B605 Dolby HX Pro circuitry.jpg 2,000 × 2,000; 835 KB
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Yamaha K-340 Dolby HX Pro board part 1.jpg 3,921 × 2,614; 2.44 MB
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Yamaha KX-340 cassette deck - Dolby HX Pro circuitry.jpg 835 × 1,258; 283 KB
