Method and apparatus for increasing voltage in a charge pump use

Details Method and apparatus for increasing voltage in a charge pump use Method and apparatus for increasing voltage in a charge pump use

1994-11-07

1997-04-22

Chin, Wellington

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

331 8, H03D 324

Patent

active

056235232

ABSTRACT:
An apparatus and method of increasing the voltage of a charge pump (111) used in a synthesizer charge pump network (100). The invention enables a voltage boost network (123) to be connected to a charge pump (111) and utilizes a capacitor which is charged and discharged synchronously with the charge pump to allow the charge pump (111) to effectively operate at a higher voltage than ordinary supply (V2). The invention allows the synthesizer charge pump network (100) to be operated in a low voltage condition without providing switching of external voltages greater than supply thereby eliminating EMI and increasing operating efficiency.

REFERENCES:
patent: 4167711 (1979-09-01), Smoot
patent: 5057793 (1991-10-01), Cowley et al.
patent: 5068626 (1991-11-01), Takagi et al.
patent: 5359300 (1994-10-01), Minami
patent: 5576647 (1996-11-01), Sutardja et al.
patent: 5581584 (1996-12-01), Inoue et al.

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