Circuit arrangement for frequency division
AssigneeU.S. Philips Corporation
InventorWolfdietrich G. Kasperkovitz
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AssigneeU.S. Philips Corporation
InventorWolfdietrich G. Kasperkovitz
Estimating the term…
A wide-band frequency divider having a first and a second group of n transistors each, with their emitters in a first cyclic sequence alternately connected to the collectors of two transistors forming an input differential pair. The base electrode of any arbitrary transistor of said first cyclic sequence is always connected to the collector of the (n-1).sup.th transistor after said arbitrary transistor in said first sequence. The frequency divider further comprises a third and a fourth group of n transistors each, also with their emitters alternatley connected in a second cyclic sequence to the collectors of two transistors which constitute an input differential pair. The collectors of the transistors in the second sequence are each time connected to the collector of the next transistor in the first sequence. The base electrode of any arbitrary transistor of said second cyclic sequence is always connected to the collector of the n.sup.th transistor after said arbitrary transistor in that sequence.
A circuit for frequency division comprising, first and second input terminals, first and second transistors having emitter electrodes connected in common, first and second groups of transistors with each group comprising n transistors, n being at least two, each of said transistors having a collector, a base and an emitter, means connecting the emitter electrodes of the transistors of the first and second groups to the collector electrodes of the first and the second transistor respectively, to form a first cyclic electrical sequence of transistors with said sequence alternating between said first and second groups so that each transistor of one group is followed in said sequence by a transistor of the other group, means coupling the base electrodes of the transistors of the first cyclic sequence to the collector electrodes thereof so that the base electrode of any arbitrary transistor of the first cyclic sequence is always coupled to the collector electrode of the (n-1) transistor of said first sequence after said arbitrary transistor, means coupling each collector electrode of the transistors of said first and second groups via a load to a point of reference voltage, third and fourth transistors having emitter electrodes connected in common, third and fourth groups of transistors with each group comprising the same number of n transistors as are present in the first and second groups of transistors, each of said transistors having a collector, a base and an emitter, means connecting the emitter electrodes of the transistors of the third and the fourth groups to the collector electrodes of the third and the fourth transistor respectively, to form a second cyclic electrical sequence of transistors with said second sequence alternating between said third and fourth groups so that each transistor of one group is followed in said sequence by a transistor of the other group, means coupling the base electrodes of the transistors of the third and fourth groups to the collector electrodes thereof so that the base electrode of any arbitrary transistor of the second cyclic electrical sequence is always coupled to the collector electrode of the n.sup.th transistor of said second sequence after said arbitrary transistor, means connecting the collector of a transistor of the third group to the collector of a transistor of the first group and the collector of every next transistor of the third and the fourth group in the second sequence to the collector of the next transistor of the first and the second group in the first sequence, and wherein said first, second, third and fourth transistors each have a control electrode, and means coupling said control electrodes to said first and second input terminals so that said first and second transistors and said third and fourth transistors are turned on alternately by an input signal applied to said input terminals and with the first and fourth transistors simultaneously conductive and the second and third transistors simultaneously conductive.
A frequency divider comprising, first and second signal input terminals, first and second transistors having emitter electrodes connected in common to a first supply terminal for a source of electric energy, means coupling a control electrode of the first and second transistors to the first and second signal input terminals respectively, whereby an input signal at said terminals alternately operates said transistors, a first group of n transistors where n is at least two, a second group of n transistors equal in number to the first group, each of said transistors having a collector, a base and an emitter, means connecting the emitters of the first group of transistors to the collector of the first transistor and the emitters of the second group of transistors to the collector of the second transistor, means intercoupling the base electrodes of the transistors of the first group to the collector electrodes of the transistors of the second group and the base electrodes of the transistors of the second group to the collector electrodes of the transistors of the first group in a given cyclic electric sequence whereby the transistors of said first and second groups are made to conduct in a given cyclic sequence in response to an input signal at the signal input terminals, said intercoupling means producing a traveling wave of collector currents propagating along the transistors in said cyclic sequence and a traveling wave of base voltages propagating along the transistors in said cyclic sequence and with a given phase shift therebetween, load means coupled to the collectors of said first and second groups of transistors, and means coupled to said signal input terminals and to the base electrodes of the transistors of said first and second groups of transistors for altering the value of said given phase shift between the collector current wave and the base voltage wave as a function of the frequency of an input signal.
Dependencies are inferred from the claim text.