Document Type and Number:
Japanese Patent JPS53143549
Kind Code:
U
Abstract:
A frequency dividing circuit for dividing an input signal provided from a signal source at a selected dividing ratio includes first and second cascade-connected frequency dividers with signal controlling gates connected between the signal source and the first frequency divider, between the first and second frequency dividers, and between the signal source and the gates connected between the first and second frequency dividers. The signal controlling gates may be selectively controlled by a control switch to define a first signal path that includes both the first and second frequency dividers to effectively divide the input signal by both frequency dividers or a second signal path that includes only the second frequency divider to effectively divide the input signal by the second frequency divider only. The circuit includes input amplifiers which may be connected to various signal sources including signal sources that employ crystal oscillators, RC oscillators, and other types of oscillating circuits.
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Application Number:
JP4882277U
Publication Date:
November 13, 1978
Filing Date:
April 18, 1977
Export Citation:
International Classes:
G04G3/02; H03K23/64; H03K23/66; H03B19/00; (IPC1-7): H03B19/10; H03K3/72; H03K5/00; H03K21/00
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