Programmable digital loop filter

Details Programmable digital loop filter Programmable digital loop filter

1990-07-26

1991-10-22

Shaw, Dale M.

Boots, shoes, and leggings

G06F 1531

Patent

active

050601806

ABSTRACT:
A programmable second order loop filter is provided with first and second programmable scaling circuits arranged in parallel and having their outputs connected to first and second programmable one bit serial adders respectively. The output of the second programmable serial adder is coupled to the input of said first programmable serial adder and has its output coupled to the input of a programmable output stage so as to provide the ability to maintain the average quantization bit error to one-half of one bit of the least significant bit of the full loop filter width even though the output does not use or employ all of the significant bits.

REFERENCES:
patent: 4727506 (1988-02-01), Fling
patent: 4807174 (1989-02-01), Costas
patent: 4809207 (1989-02-01), Nillesen
patent: 4879674 (1989-11-01), Iijima et al.

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