Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1993-06-02
1994-11-08
Sikes, William L.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327156, 327322, 327536, H03K 301, H03K 513, H03L 500
Patent
active
053629906
ABSTRACT:
A charge pump has a reference circuitry (18, 20, 22), a first parallel current path (16), at least one second parallel current path (16), a mirror circuit (46), a sourcing circuitry (60, 62) and a sinking circuitry (50, 54, 66, 68). The first and the at least one second parallel current path sink current from a first node responsive to a predetermined voltage generated by the reference circuitry. The at least one second current path also operates responsive to a control signal. The mirror circuit generates a second predetermined voltage responsive to the total current sunk from the first node. The sourcing circuitry and the sinking circuitry sourcing and sinking a current from the output node, respectively, responsive to the second predetermined voltage and to a control signal. The disclosed charge pump may be incorporated into a phase locked loop circuit where constant stability parameters are desired.
REFERENCES:
patent: 4680488 (1987-07-01), Okumura
patent: 4896297 (1990-01-01), Miyatake
patent: 4906056 (1990-03-01), Taniguchi
patent: 5056062 (1991-10-01), Kuwabara
A Single-Chip, 1.2 GHZ, PLL Frequency Synthesizer Using Reduced Capacitance, Dual Gate, BICMOS Technology, Huehne; IEEE, May 6, 1992, pp. 24.3.1-24.3.5.
Alvarez Jose
Gerosa Gianfranco
Sanchez Hector
Chastain Lee E.
Motorola Inc.
Nguyen Tiep H.
Sikes William L.
LandOfFree
Charge pump with a programmable pump current and system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Charge pump with a programmable pump current and system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Charge pump with a programmable pump current and system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1784916