Method and circuit for controlling a band display of a plurality of analog signals using a single anode type bar graph device

A control circuit for a band display of at least two analog signals wherein first and second analog signals are displayed, said control circuit comprising

• a sawtooth generator having an input and first and second outputs and providing sawtooth and reset signals at the first and second outputs, respectively;
• a first comparator circuit having an output, a first input to which the first analog signal is supplied and a second input connected to the first output of said sawtooth generator, said first comparator comparing said first analog signal with said first sawtooth signal and providing at its output a pulse for forming the display;
• display means having display elements;
• deceleration duration means for defining the scanning speed deceleration duration of the display elements, said deceleration duration means having an output and an input connected to the output of said first comparator circuit;
• a phase duration circuit having a first input connected to the output of said deceleration duration means, a second input, a first output and a second output coupled to the display means, said phase duration circuit defining the scanning speed of the display elements under the control of said deceleration duration means;
• sawtooth generator stopping means having a first input connected to the output of said deceleration duration means, a second input connected to the first output of said phase duration circuit and an output connected to the input of said sawtooth generator, said sawtooth generator stopping means decelerating an increase of said sawtooth signal;
• a second comparator circuit having an output, a first input to which the second analog signal is supplied and a second input connected to the first output of said sawtooth generator, said second comparator circuit comparing said second analog signal with said sawtooth signal and providing at its output a pulse for forming the display;
• and
• current restricting means having an output connected to the display elements of the display means and an input coupled to the output of said second comparator circuit, said current restricting means restricting the current of said display elements under the control of the output pulse of said second comparator circuit.