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Apparatus and method for frequency generation

A technology of oscillators and inductors, applied in the field of equipment and methods for frequency generation, capable of solving problems such as the fact that coupling between inductors and inductors is unavoidable and coupling is reduced

Active Publication Date: 2012-05-16
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, it may be necessary to reduce coupling between inductors of different oscillators built on the same IC
[0007] However, given the physical proximity of inductors located on the same IC can make substantial inductor-to-inductor coupling difficult to avoid

Method used

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  • Apparatus and method for frequency generation
  • Apparatus and method for frequency generation
  • Apparatus and method for frequency generation

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Embodiment Construction

[0029] In this document, the words "embodiment", "modification" and similar expressions are used to refer to a specific device, process or article and not necessarily to the same device, process or article. Therefore, "one embodiment" (or similar expressions) used in one place or in context may refer to a specific device, process or product; the same or similar expressions in different places may refer to different devices, processes or products. The expression "alternative embodiment" and similar phrases may be used to indicate one of several different possible embodiments. The number of possible embodiments is not necessarily limited to two or any other number.

[0030]The word "exemplary" may be used herein to mean "serving as an example, instance, or illustration." Any embodiment or variation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or variations. All embodiments and modifications described in ...

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Abstract

A wideband frequency generator has two or more oscillators for different frequency bands, disposed on the same die within a flip chip package. Coupling between inductors of the two oscillators is reduced by placing one inductor on the die and the other inductor on the package, separating the inductors by a solder bump diameter. The loosely coupled inductors allow manipulation of the LC tank circuit of one of the oscillators to increase the bandwidth of the other oscillator, and vice versa. Preventing undesirable mode of oscillation in one of the oscillators may be achieved by loading the LC tank circuit of the other oscillator with a large capacitance, such as the entire capacitance of the coarse tuning bank of the other oscillator.; Preventing the undesirable mode may also be achieved by decreasing the quality factor of the other oscillator's LC tank and thereby increasing the losses in the tank circuit.

Description

technical field [0001] The devices and methods described in this document relate to frequency generators and methods for frequency generation. More specifically, the devices and methods relate to frequency generation using multiple oscillators. Background technique [0002] Tunable frequency generators are used in many different electronic devices. Wireless communication devices, for example, use frequency generators for upconverting transmitted signals to intermediate and RF frequencies, and for downconverting received signals to intermediate and baseband frequencies. Since the operating frequency varies, the frequency of the generator needs to be tunable. [0003] The frequency coverage required by multiple communication standards and multiple frequency bands often requires oscillators with wide tuning ranges such as voltage-controlled oscillators (VCOs) and digitally controlled oscillators (DCOs) . The breadth of an oscillator's tuning range is an important performance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L23/498H01L23/64H03B1/02
CPCH01L23/645H03B21/00H01L2924/19015H01L2924/15311H01L23/49816H01L2224/16225H01L2924/3011H01L2224/05573H01L2224/05568H01L2924/00014H01L2224/0554H01L2224/06135H01L2224/05599H01L2224/0555H01L2224/0556H01L23/64H01L23/498H03B1/02
Inventor 拉贾戈帕兰·兰加拉詹钦玛雅·米什拉毛林·巴加特靳彰
Owner QUALCOMM INC