Title:
LOAD PUMP UNIT
Document Type and Number:
Japanese Patent JPS61182319
Kind Code:
A
Abstract:
The present invention discloses a low order charge-pump filter operable with a single variable current source. The integrating capacitor of the charge-pump is connected in an H-bridge switching configuration with four switches that are operable to control the current source to supply current to a first node of the capacitor or to a second node of the capacitor or to bypass a capacitor, depending on the state of operation of the charge-pump. The charge-pump filter disclosed is particularly useful for providing the low order response for a phase detector in a phase-locked loop.
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Inventors:
NIIRU AARU ADAMUZU
Application Number:
JP2108186A
Publication Date:
August 15, 1986
Filing Date:
January 31, 1986
Export Citation:
Assignee:
ADVANCED MICRO DEVICES INC
International Classes:
H03F1/02; H03K5/26; H03L7/08; H03K9/04; H03L7/089; H03L7/093; (IPC1-7): H03K5/26; H03K9/04; H03L7/08
Domestic Patent References:
| JPS5730414A | 1982-02-18 |
Attorney, Agent or Firm:
Kuro Fukami