Invention Grant
US5912596A Apparatus and method for frequency tuning an LC oscillator in a
integrated clock circuit
失效
用于在集成时钟电路中对LC振荡器进行频率调谐的装置和方法
- Patent Title: Apparatus and method for frequency tuning an LC oscillator in a integrated clock circuit
- Patent Title (中): 用于在集成时钟电路中对LC振荡器进行频率调谐的装置和方法
-
Application No.: US13280Application Date: 1998-01-26
-
Publication No.: US5912596APublication Date: 1999-06-15
- Inventor: Uttam Shymalindu Ghoshal
- Applicant: Uttam Shymalindu Ghoshal
- Applicant Address: NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: NY Armonk
- Main IPC: H03B1/00
- IPC: H03B1/00 ; H03B5/12 ; H03B27/00 ; H03K3/03 ; H03K3/354 ; H03B5/02
Abstract:
A method and system in an integrated circuit for frequency tuning oscillator circuits. An oscillator circuit within an integrated circuit is formed on a substrate such that the oscillator circuit is coupled to an inductor component. The inductor component includes a first inductor positioned parallel to a second inductor such that a total effective inductance is associated with the first and second inductors. The first inductor is formed from a first spiral coil layer which is coupled to a second spiral coil layer on the substrate. The second inductor is formed of a single spiral coil layer on the substrate, wherein the single spiral coil layer provides an inductive feedback signal to the oscillator circuit when electrical current flows through the single spiral coil layer in response to current flowing through the first spiral coil layer and the second spiral coil layer. The feedback signal can be adjusted such that a change in a phase associated with the feedback signal results in an alteration of the total effective inductance, which in turn shifts a center frequency associated with the oscillator circuit thereby promoting frequency tuning of the oscillator circuit over a wide tuning range. In addition, a capacitor component can be connected to the oscillator circuit such that the capacitor component includes two series connected capacitors which have an associated effective capacitance. A change in the effective capacitance also results in a shift in the center frequency.
Public/Granted literature
- USD353856S Adult male doll Public/Granted day:1994-12-27
Information query