Balanced Phono-Amps: An Extension to the 'The Sound of Silence' Editions

Balanced Phono-Amps: An Extension to the 'The Sound of Silence' Editions

Burkhard Vogel

Language: English

Pages: 436

ISBN: 3319368907

Format: PDF / Kindle (mobi) / ePub


This book presents the design, analysis and testing of fully balanced RIAA phono amps and measurement tools. The content of this book extends a standard reference about RIAA phono amps “the sound of silence” by Burkhard Vogel. Here, the gap is filled between a semi-balanced engine (RIAA Phono-Amp Engine I) and a fully balanced engine, the RIAA Phono-Amp Engine II. In this new book on hand, “fully balanced” means that each phono-amp stage ends up in a balanced - or in other words symmetrical - solution, differentially amplified. Un-balanced / single-ended solutions are not in the scope.

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Burkhard Vogel Balanced Phono-Amps An Extension to the ‘The Sound of Silence’ Editions Balanced Phono-Amps Burkhard Vogel Balanced Phono-Amps An Extension to the ‘The Sound of Silence’ Editions 123 Burkhard Vogel Lab 6-11 Stuttgart Germany Additional material to this book can be downloaded from http://extras.springer.com. Additional material to this book can be downloaded from http://extras.springer.com. ISBN 978-3-319-18523-1 DOI 10.1007/978-3-319-18524-8 ISBN 978-3-319-18524-8

. . . . . . . . . . . . . . . . Figure 13.6 Principal Ovidiu Popa design with additional and new output stage, turned into a linear input amp for Engine II purposes . . . . . . . . . . . . . . . . . . . . . . . . . Figure 13.7 Principal Bob Cordell design with an additional and new output stage . . . . . . . . . . . . . . . . . . . . . . . . . . Figure Figure Figure Figure Figure 14.1 14.2 14.3 14.4 14.5 .. 171 .. 172 .. 173 .. .. .. 174 174 175 .. 181 .. 182 .. 183 ..... 188

rffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi   en:i ðf Þ2 G22nd þ 2 e2n:R4 þ in:i:1 ðf Þ2 R42 þ e2n:RG:o G2nd en:RG:o ¼ ðG2nd À 1Þ pffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi 4 k T B1 ðR3 þ P1Þ ð8:5Þ ð8:6Þ ð8:7Þ Both Chap. 9 worksheets calculate the relevant SNs and Noise Figures NF in an input load dependent format. Figures 9.6, 9.7, 9.8 and 9.15 are the relevant graphs with the R0 dependent curves. 8.3 Measurement Results The following

design of a fully balanced RIAA phono-amp is missing. Finally, in these books, all mathematical- and design-oriented efforts led to the semi-balanced “RIAA Phono-Amp Engine I” that includes different modules of solid-state and triode-driven phono-amps; the triode module in the second edition first. Semi-balanced, because Engine I offers balanced and/or un-balanced inputs, followed by an un-balanced treatment of the RIAA transfer function creation—via feedback path in the solid-state environment,

noise voltage density with R0 = 0 Ω . . . . NF of Amp1 vs. R0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 113 113 114 115 117 117 118 119 120 120 121 122 124 .... 126 .... 127 .... 129 .... .... 129 129 .... 130 . . . . . 130 132 133 134 135 Figure 10.1 Input gain stage alternative Amp2 . . . . . . . . . . . . . . . Figure 10.2 Booster for insertion into Fig. 10.1’s points A + A’ and B + B’ . . . . . . . . . . . . . .

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