Invention Grant
- Patent Title: Current controlled oscillation device and method having wide frequency range
- Patent Title (中): 电流控制振荡装置及方法频率范围宽
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Application No.: US11927754Application Date: 2007-10-30
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Publication No.: US07915963B2Publication Date: 2011-03-29
- Inventor: Ram Kelkar , Anjali R. Malladi
- Applicant: Ram Kelkar , Anjali R. Malladi
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Cantor Colburn LLP
- Agent Michael LeStrange
- Main IPC: H03K3/03
- IPC: H03K3/03 ; H03L7/093 ; H03L7/099

Abstract:
A current controlled, phase locked loop device includes a phase detector configured to compare a reference frequency to an output frequency of a current controlled oscillator (ICO), a charge pump coupled to the phase detector and a low pass filter coupled to the charge pump. A voltage to current (V to I) converter is coupled to the low pass filter, providing an output current for integral control of the ICO. A control circuit is coupled to the ICO, and receives increment and decrement outputs of the phase detector, wherein the control circuit is configured to provide proportional control of the ICO through an amount of bias current applied thereto.
Public/Granted literature
- US20080061895A1 IMPROVED CURRENT CONTROLLED OSCILLATION DEVICE AND METHOD HAVING WIDE FREQUENCY RANGE Public/Granted day:2008-03-13
Information query
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