Sine wave generation circuit

Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Generating sinusoidal output

Reexamination Certificate

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Details

C327S105000

Reexamination Certificate

active

07019567

ABSTRACT:
A sine wave generation circuit for generating a high precision pseudo sine wave without increasing the circuit size including a pulse generation circuit for generating a plurality of pulse signals using an input clock signal as reference and a voltage output circuit for stepwisely changing the voltage level of the output on the basis of a plurality of pulse signals. The voltage output circuit generates a plurality of different coefficients in response to a combination of bit information in a plurality of pulse signals and changes the output of the voltage output circuit in response to a coefficient series obtained when further combining the plurality of generated coefficients, and odd number generation circuits each generating odd number values of ternary-values or more having positive side coefficients and negative side coefficients symmetric about a center coefficient are provided in a plurality of coefficient generation circuits provided in the voltage output circuit.

REFERENCES:
patent: 5504445 (1996-04-01), Miki
patent: 5598440 (1997-01-01), Domagala
patent: 6483356 (2002-11-01), Suzuki et al.
patent: 6587862 (2003-07-01), Henderson
patent: 2005/0195014 (2005-09-01), Katakura
patent: 361098003 (1986-05-01), None
patent: 405063783 (1993-03-01), None
patent: 05-183341 (1993-07-01), None
patent: 10-209757 (1998-08-01), None

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