Method and apparatus for increasing the resolution of a digital

Details Method and apparatus for increasing the resolution of a digital Method and apparatus for increasing the resolution of a digital

1993-10-01

1995-11-28

Chin, Stephen

Pulse or digital communications

Pulse width modulation

341145, 341131, H03K 708

Patent

active

054715059

ABSTRACT:
A method and apparatus for increasing the resolution of a pulse width modulated signal representative of a measured parameter such as the pressure measured by a pressure cell. The analog signal from the pressure cell is converted to a digital signal using a predetermined clock frequency. The digital signal is scaled to 2.sup.N (N is an integer greater than or equal to one) times the clock frequency and the N lowest order bits are checked to determine if they are a one or a zero. A one is added to the least significant bit of the scaled digital signal in a predetermined manner in the next N consecutive cycles of the scaled digital signal dependent upon the which of the N lowest order bits are a one.

REFERENCES:
patent: 4233591 (1980-11-01), Murata et al.
patent: 4590457 (1986-05-01), Amir
patent: 4926174 (1990-05-01), Fiori, Jr.
patent: 4963870 (1990-10-01), Obinata
patent: 5103462 (1992-04-01), Elle et al.

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