Discontinuous tuning Selecting predetermined frequencies Selecting frequency bands with or without continuous tuning in one or more of the bands

HELECTRICITY H03Electronic circuits H03JTUNING RESONANT CIRCUITS SELECTING RESONANT CIRCUITS

H03J5/00Discontinuous tuning Selecting predetermined frequencies Selecting frequency bands with or without continuous tuning in one or more of the bands

H03J5/02with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings H03J5/0209Discontinuous tuning using an electrical variable impedance element H03J5/0218Discontinuous tuning using an electrical variable impedance element H03J5/0227using a counter H03J5/0236with possibility to skip over certain counter positions H03J5/0245Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset H03J5/0254the digital values being transfered to a D/A converter H03J5/0263the digital values being held in an auxiliary non erasable memory H03J5/0272the digital values being used to preset a counter or a frequency divider in a phase locked loop H03J5/0281the digital values being held in an auxiliary non erasable memory H03J5/029with channel skipping capability H03J5/04operated by hand H03J5/06Settings determined by single indexing means with snap action H03J5/08Settings determined by a number of separately-actuated positioning means H03J5/10Settings determined by a number of positioning means mounted on a common support H03J5/12Settings determined by a number of separately-actuated driving means which adjust the tuning element directly to desired settings H03J5/14operated by auxiliary power H03J5/143Settings determined by a number of positioning means mounted on a common support H03J5/146Settings desired by a switch controlled together with the tuning member and which stops the control as soon as a desired position is reached H03J5/16Settings determined by a number of separate positioning means actuated by hand H03J5/18Settings determined by a number of separate positioning means actuated by electromagnets H03J5/20Settings determined by a number of positioning means actuated by a second means adjustable to different positions by the same or by a second auxiliary power H03J5/22Settings determined by a number of separately actuated driving means which adjust the tuning element directly to desired settings H03J5/24with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit H03J5/242used exclusively for band selection H03J5/244using electronic means H03J5/246using electronic means H03J5/248using electromechanical means H03J5/26operated by hand H03J5/28Tuning circuits or elements supported on a revolving member with contacts arranged in a plane perpendicular to the axis H03J5/30Tuning circuits or elements supported on a revolving member with contacts arranged in lines parallel to the axis H03J5/32Stationary tuning circuits or elements selected by push-button