Multi-stage frequency dividers and poly-phase signal generators
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorReza Bagger
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Abstract
An electronic latch circuit, a 4-phase signal generator, a multi-stage frequency divider and a poly-phase signal generator are disclosed. The electronic latch circuit comprises an output circuit comprising a first output and a second output. The electronic latch circuit further comprises an input circuit comprising a first input, a second input and a clock signal input. The electronic latch circuit is configured to change state based on the input signals' level at the inputs of the input circuit and a present state of the output circuit. The 4-phase signal generator is built with two electronic latch circuits. The multi-stage frequency dividers and poly-phase signal generators comprise a plurality of the electronic latch circuits and 4-phase signal generators.
Claims3
A multi-stage frequency divider comprising:
- a first stage comprising a 4-phase signal generator;
- and
- a plurality N of cascaded stages, each stage comprising 2N−1 branches, wherein N=2, 3, . . . ;
- and wherein each branch comprises:
- an electronic latch circuit;
- and
- a first 4-phase signal generator;
- and wherein in each branch:
- the first and second inputs of the electronic latch circuit is connected to a pair of the output signals at the outputs of the 4-phase signal generator in the stage preceding it;
- and
- the first and second outputs of the electronic latch circuit is connected to the first and second clock signal inputs of the first 4-phase signal generator in the same branch;
- and the clock signal input of the electronic latch circuit is connected to the first or second clock signal input of the 4-phase signal generator in the stage preceding it.
Dependencies are inferred from the claim text.