Discontinuous signal interpolation circuit

Details Discontinuous signal interpolation circuit Discontinuous signal interpolation circuit

1998-08-05

2000-08-22

Malzahn, David H.

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

708313, G06F 1717

Patent

active

061086797

ABSTRACT:
An input phase signal having a presentation range from 0 radian to a value smaller than 2.pi. radian is input to a least significant side shift register 1-1 and to a discontinuity detector 3. The discontinuity detector 3 compares the input phase signal with the same signal delayed by a time corresponding to 1 sample clock in the shift register 1-1, detects a phase discontinuity and outputs 2.pi. radian when the phase transition is 0.fwdarw.2.pi., -2.pi. radian when the phase transition is 2.pi..fwdarw.0 and 0 radian when there is no discontinuity detected. The output of the discontinuity detector 3 is added to outputs of the respective most significant side shift registers 4-1 to 4-n by adders 5-1 to 5-n, respectively. An interpolation circuit 2 performs an interpolation by adding the outputs of the least significant side shift registers 1-1 to 1-n to outputs of the adders 5-1 to 5-n.

REFERENCES:
patent: 5434489 (1995-07-01), Cheng et al.
patent: 5734688 (1998-03-01), Teraguchi et al.
patent: 6031885 (2000-02-01), Ishimoto et al.

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