Stepped signal generating circuit

Details Stepped signal generating circuit Stepped signal generating circuit

1990-12-12

1992-11-24

Howell, Janice A.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307490, 307497, 307241, 307261, 328 36, 328156, 328186, 323315, H03K 402, H03K 500, H03K 508, G06G 712

Patent

active

051665409

ABSTRACT:
The present invention discloses a stepped signal generating circuit for producing stepped signals having nearly perfect sinusoidal stepped signals. The stepped signal generating circuit comprises a plurality of current mirror switching sections, each having a P type and an N type current mirror for outputting constant currents upon receiving digital signals. N-MOS transistors are provided to pass or block the output current of each switching section. The constant currents outputted from the switching sections are then controlled by a constant voltage of the constant voltage source. The final output is controlled by a constant current of a constant current source before being outputted. Accordingly, the present invention generates precise and nearly sinusoidal stepped signals.

REFERENCES:
patent: 3571577 (1971-03-01), Kubo
patent: 4473802 (1984-09-01), Min et al.
patent: 4883988 (1989-11-01), Ide et al.

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