Low-power-consumption wideband voltage-controlled oscillator

Abstract

The invention discloses a low-power-consumption wideband voltage-controlled oscillator, which comprises a first negative resistance circuit module, a second negative resistance circuit module and a four-order resonant cavity. By using the dual-resonant-frequency characteristic of the four-order resonant cavity and controlling the first negative resistance circuit module or the second negative resistance circuit module to compensate the energy loss of the four-order resonant cavity, the four-order resonant cavity is enabled to alternatively resonate at a high frequency band and a low frequency band which are close to each other, and the two frequency bands are enabled to be partially overlapped to cover a very wide frequency range. In addition, the first negative resistance circuit module and the second negative resistance circuit module adopt a current reuse technique to reduce power consumption and improve phase noise, so that lower power consumption and lower phase noise can be realized at the same time when the circuit of the voltage-controlled oscillator outputs wide-range frequency.

Description

technical field [0001] The invention belongs to the technical field of radio frequency wireless receiver integrated circuits, and in particular relates to a low-power broadband voltage-controlled oscillator used in a frequency synthesizer of a wireless receiver. Background technique [0002] At present, wireless communication technology and related services are developing rapidly around the world. Wireless receivers that can support multiple modes and standards, as well as future software-defined radios and cognitive radios will be an important trend in future radio development. The research and realization of multi-mode multi-frequency wireless communication system has become a hot spot in the development of wireless communication technology. This new trend and new requirements bring great challenges to the design of wireless transceivers. The frequency synthesizer is one of the most critical modules of the transceiver chip, and its performance directly affects the perform...

AI Technical Summary

Problems solved by technology

However, under the premise of satisfying a certain phase noise and power consumption, the traditional LC-VCO is limited by the ratio of the maximum and minimum capacitance value that can be obtained by the variable capacitor, and its output frequency range is limited, so it cannot meet the needs of future multi-mode Multi-frequency system applications require the

[0004] In order to achieve a wide frequency tuning range, multiple inductor-capacitor voltage-controlled oscillators can be connected in parallel. This simple integration method will inevitably lead to a continuous increase in area and a sharp increase in power consumption.

In addition, it is also possible to use an inductor-capacitor voltage-controlled oscillator combined with additional circuits such as frequency dividers, frequency multipliers, and mixers to shift the spectrum of the signal to broaden the frequency output range. However, additional circuits not only bring additional hardware overhead but also increase The overall power consumption is reduced, and at the same time, due to the influence of signal coupling, leakage and other effects, the output signal has large spurs, which usually need to be suppressed by filters in actual use

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