Importance

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Abstract

A dividing mechanism for use in frequency synthesizers: comprising: a two modulus divider system having a first and second counter for providing respective programmable count totals A, M, and first counter being coupled to a dual modulus device providing moduli of n and n+1 whereby the two modulus divider system provides a division ratio of (Mn+A) for incoming signals: first and second input means for receiving first and second programming number signals N, Q, synchronization means for receiving a strobe signal from a further counter which provides a count total P, and logic interface means responsive to said first and second input means and said synchronization means to provide programming number signals A, M to said two modulus divider system, the logic interface means being such that in the absence of said strobe signal the two modulus divider system provides a count total C.sub.1 =f(N), and following the reception of the strobe signal the two modulus divider system provides at least one count cycle with a count total C.sub.2 =f(N,Q), whereby if the output of the two modulus divider system is coupled to said external counter, said dividing mechanism provides a count total C.sub.3 =f(P,N,Q).

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First Claim