Electronic switch for auxiliary equipment - is additional to other electronic switches and used with mechanical selector switch

摘要

The switch circuit connects several AF signal sources to a single output line using electronic switches whose control inputs are connected to a selection switch. For example, the circuit connects a loudspeaker to either a tape recorded or record player etc. An extra circuit (20) connected to the output line (23) influences the output line electrically in the same way as the electronic switch (4, 14). The control input (22) of this extra circuit is connected by an evaluator to the selection switch (7). The extra circuit is only connected to the output line when the selection switch input (8) is connected to no output.