Stereo Separation Adjustment Circuit And Mos Integrated Circuit Thereof
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United States of America Patent
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Issued Date -
Feb 7, 2008
app pub date -
Jun 8, 2005
filing date -
Jun 25, 2004
priority date (Note) -
Abandoned
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Abstract
A stereophonic separation can be adjusted without narrowing the dynamic range. Between the sources of a MOS transistor (Q5), to which a composite signal is inputted, and a MOS transistor (Q6), to which a reference voltage is inputted, there are connected in parallel the series connections of resistors and switch elements (R1) and (SW1), (R2) and (SW2), (R3) and (SW3), and so on. The separation level can be so adjusted in DC operations that the resistors (R1 to R5) may exert no influence on the output voltage of the MOS transistor (Q5), and in AC operations that the values of the parallel resistors (R1 to R5) may be varied.
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