Wideband voltage-controlled oscillator circuit with low phase noise and low power consumption

A voltage-controlled oscillator, low-power technology, applied in the field of microelectronics, can solve the problems of increased power consumption, deterioration of oscillation output phase noise, and prolonged start-up time, etc., to achieve low power consumption, wide frequency adjustment range, low phase effect of noise

Inactive Publication Date: 2015-07-01
HANGZHOU DIANZI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, connecting too many switched capacitors in parallel to the resonant circuit will significantly reduce the quality factor of the

Method used

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  • Wideband voltage-controlled oscillator circuit with low phase noise and low power consumption
  • Wideband voltage-controlled oscillator circuit with low phase noise and low power consumption
  • Wideband voltage-controlled oscillator circuit with low phase noise and low power consumption

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Embodiment Construction

[0020] The circuit structure and phase noise optimization method of the present invention will be further described in detail below in conjunction with the accompanying drawings. In order to illustrate the effect of the present invention, a 65nm CMOS process is used for design tape-out verification.

[0021] Such as figure 1 As shown, a low-phase noise low-power broadband voltage-controlled oscillator circuit includes a negative resistance oscillation structure and two buffer structures, and the negative resistance oscillation structure includes a negative resistance structure and a resonance network;

[0022] The second PMOS transistor MP2, the third PMOS transistor MP3, the second NMOS transistor MN2 and the third NMOS transistor MN3 form a negative resistance structure, wherein the gate of the second PMOS transistor MP2, the drain of the third PMOS transistor MP3 and the second NMOS transistor MP3 The gate of the transistor MN2 and the drain of the third NMOS transistor MN...

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Abstract

The present invention relates to a wideband voltage-controlled oscillator circuit with low phase noise and low power consumption. A conventional wideband voltage-controlled oscillator has poor noiseproof performance and high power consumption and the application of the conventional wideband voltage-controlled oscillator in a radio-frequency communication system is limited. The wideband voltage-controlled oscillator circuit of the present invention comprises one negative-resistance oscillation structure and two buffer structures, wherein the negative-resistance oscillation structure comprises a negative-resistance structure and a resonant network; the negative-resistance structure comprises two PMOS (Positive Channel Metal Oxide Semiconductor) transistors and two NMOS (Negative Channel Metal Oxide Semiconductor) transistors; the resonant network comprises a resonant inductor, a switched capacitor array, two variable capacitors and two fixed capacitors; the switched capacitor array comprises fifteen switched capacitor units to form four controlled selection ends for realizing sixteen frequency band selections; each switched capacitor unit comprises two MOM (Metal-Oxide-Metal) capacitors, two inverters and one NMOS transistor; and three-dimensional interdigital capacitors are adopted as the MOM capacitors. The oscillator circuit of the present invention realizes a wide frequency regulating range and realizes the performance of low phase noise and low power consumption through corresponding phase noise optimization.

Description

technical field [0001] The invention belongs to the technical field of microelectronics, and relates to a low-phase-noise, low-power-consumption broadband voltage-controlled oscillator circuit. Background technique [0002] In recent years, wireless communication has developed rapidly, and the working frequency range involves 100M to 10G, so it is necessary to design a low-power wideband transceiver to meet the requirements of various wireless communication protocols. As the most basic building block in the transceiver, the voltage-controlled oscillator provides the local oscillator frequency for transmission and reception, and is the module with the highest operating frequency in the system. Under the premise of ensuring power consumption and phase noise, the voltage-controlled oscillator should have a wide frequency coverage to meet the needs of different applications. [0003] Commonly used structures for oscillators are LC oscillators and ring oscillators. The ring osc...

Claims

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Application Information

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IPC IPC(8): H03K3/012H03K3/013
Inventor 周明珠孙玲玲
Owner HANGZHOU DIANZI UNIV
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