| 摘要 |
<p>In an amplifier circuit having at least two signal-source terminals (IN; IN Ch I, IN Ch2) to allow signal sources (Q, Q1 to Q7) to be connected in and to allow signal-source signals (Q; QS 1, QS2) to be fed to the amplifier circuit, that has at least two amplifier stages (A1, A2) that are each arranged to amplify input signals able to be fed to them and to drive electrical loads (SP 1, SP2; LOAD 1, LOAD2, LOAD3) with the input signals amplified by them, there are provided configuration setting means (K1, K2, K3) for setting the configuration of the amplifier stages (A1, A2), as a function of the absence or presence of a configuration control signal (KS) able to be fed to them, either to a mutually independent amplifier stage configuration or to a mutually dependent amplifier stage configuration, and also provided are detection means (A3, A4, AND; 10, 14, 16, 21, 25) that are arranged to detect the absence of a connection between a signal-source terminal (IN; IN Chl, IN Ch2) and a signal source (Q, Q1 to Q7) and, when the absence of such a connection is detected, to generate the configuration control signal (KS).</p> |
