Integrated inductance capacitance voltage-controlled oscillator for ultra-wideband low-phase noise

A technology of voltage-controlled oscillators and integrated inductors, applied in power oscillators, automatic power control, electrical components, etc., can solve the problems of deterioration of oscillation output phase noise, prolonged start-up time, increased power consumption, etc., and achieves wide tuning. effect of range, reduced impact, improved driving ability

Inactive Publication Date: 2010-10-20
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology

However, too many switched capacitors will not only significantly increase the design complexity, but also process deviation and excessive parasitic benefits will offset some of the benefits of switched capacitors
At the same time, too many switched capacitors connected in parallel to the resonant circuit

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  • Integrated inductance capacitance voltage-controlled oscillator for ultra-wideband low-phase noise
  • Integrated inductance capacitance voltage-controlled oscillator for ultra-wideband low-phase noise
  • Integrated inductance capacitance voltage-controlled oscillator for ultra-wideband low-phase noise

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[0033] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail in conjunction with specific embodiments and with reference to the accompanying drawings.

[0034] Such as figure 1 As shown, the integrated inductor-capacitor voltage-controlled oscillator proposed by the present invention includes four programmable negative resistance type LC oscillating core circuits, and a common output stage connected to the four programmable negative resistance type LC oscillating core circuits ; And a bias module with a programmable current size, the bias module is connected to the four programmable negative resistance LC oscillation core circuits through a controlled switch.

[0035] The four programmable negative resistance LC oscillator core circuits have the same structure, such as figure 2 As shown, each oscillating core circuit includes an LC resonance circuit, a negative resistanc...

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Abstract

The invention discloses an integrated inductance capacitance voltage-controlled oscillator comprises four programmable negative resistance type LC (inductance capacitance) oscillating core circuits, a public output stage and a current amount programmable offset module, wherein the public output stage is connected with the four programmable negative resistance type LC oscillating core circuits; and the current amount programmable offset module is connected with the four programmable negative resistance type LC oscillating core circuits through a controlled switch. Compared with the common voltage-controlled oscillator, the integrated inductance capacitance voltage-controlled oscillator has obvious disadvantages in debugging range, phase noise, and other aspects; and in addition, the invention is specially suitable for a demanding multistandard multiband radio-frequency radio communication system.

Description

technical field [0001] The invention belongs to the technical field of radio-frequency front-end (Radio-Frequency Front-End) of a wireless communication system, and in particular relates to the structural design of a voltage-controlled oscillator used for the front-end of a wireless communication system. Background technique [0002] In recent years, with the prosperity of the wireless communication market, radio frequency integrated circuits (RFICs) have developed rapidly. These wireless applications mainly include: mobile phone, global positioning system (GPS), bluetooth (Bluetooth), wireless local area network (WLAN) and mobile TV. In these application systems, the radio frequency circuit is the key to the design of the entire transceiver system, so it has attracted much attention for many years. [0003] In the whole wireless communication system, the voltage-controlled oscillator (VCO), as an oscillator whose output frequency changes with the input tuning voltage, is t...

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Application Information

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IPC IPC(8): H03B7/02H03B5/12H03L7/099
Inventor 兰晓明颜峻石寅
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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