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Magnetic Differential Loop Filter Capacitor Element and Related Methods

A loop filter and capacitor technology, applied in capacitors, electrical components, laminated capacitors, etc., can solve the problems of inductor quality factor degradation and reduce the phase noise performance of frequency synthesizers, etc.

Active Publication Date: 2021-10-26
SILICON LAB INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Other circuitry placed in the area surrounded by the inductor degrades the quality factor of the inductor due to eddy current losses and thus degrades the phase noise performance of the frequency synthesizer

Method used

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  • Magnetic Differential Loop Filter Capacitor Element and Related Methods
  • Magnetic Differential Loop Filter Capacitor Element and Related Methods
  • Magnetic Differential Loop Filter Capacitor Element and Related Methods

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Embodiment Construction

[0023] Figure 1-Figure 3 Exemplary embodiments of a radio frequency (RF) device having a circuit architecture including phase locked loop (PLL) circuitry using inductors physically positioned adjacent to the LC-VCO(s) in the device layout of the PLL are illustrated. tor magnetic differential loop filter capacitor element. It should be understood that Figure 1-Figure 3 The illustrated embodiments are exemplary only and the disclosed PLL circuitry may be used to generate an output signal having a phase that is related to the phase of the input signal provided to the PLL.

[0024] figure 1 One exemplary embodiment in accordance with the disclosed apparatus and methods illustrates a circuit arrangement of an RF receiver 100 that may employ a PLL circuit configured as a local oscillator (LO) 125 . As shown, receiver 100 receives RF signals via antenna 115 . The RF signal is supplied to the input of a low noise amplifier (LNA) 120 . LNA 120 provides low noise amplification of...

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Abstract

The present application discloses apparatus and methods utilizing magnetic differential loop filter capacitor elements that are physically located adjacent to the voltage-controlled oscillator (VCO) inductor. Such a PLL circuit can be used, for example, to generate a PLL output signal for use in an RF receiver, RF transmitter, RF transceiver, and any other type of circuit configured to utilize a PLL output signal whose phase is based on The phase of the input signal.

Description

technical field [0001] The disclosed apparatus and methods relate generally to loop filter circuitry, and more particularly to loop filter capacitor elements. Background technique [0002] In modern integrated transceivers, the frequency synthesizer is the building block circuit. In order to meet the phase noise requirement while consuming less power, an inductor-capacitor voltage-controlled oscillator (LC-VCO) is used in a frequency synthesizer. Inductance (L) will exist in an LC-VCO circuit when current is made to flow through an inductor wire surrounding a certain area. To achieve inductance values ​​with the high quality factor typically required by modern transceivers, the available silicon area is used. Other circuitry placed in the area surrounded by the inductor degrades the quality factor of the inductor due to eddy current losses and thus degrades the phase noise performance of the frequency synthesizer. [0003] In copper-based semiconductor fabrication process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03L7/093H03L7/18H01G4/30H01G4/38H01G4/005H10N97/00
CPCH01G4/012H01G4/30H01G4/38H03L7/093H03L7/18H03L7/0893H03L7/193H03L7/099H01L28/60
Inventor A·A·拉菲
Owner SILICON LAB INC