Impedance bootstrapping frequency conversion band-pass filter

Abstract

The invention provides an impedance bootstrapping frequency conversion band-pass filter. The impedance bootstrapping frequency conversion band-pass filter at least comprises an LCR network and a frequency conversion band-pass filter body. The LCR network is used for connection to achieve matching of narrow-band input impedance and rising conversion of input source impedance to obtain in-band gain. The frequency conversion band-pass filter body is used for providing high-quality-factor band-pass impedance matched with the input impedance and cooperating with the input source impedance to achieve enhancement of out-of-band rejection. According to the impedance bootstrapping frequency conversion band-pass filter, the front LCR network is used for assisting in achieving matching of front-end impedance of a radio frequency receiver, converting and bootstrapping the input source impedance with a low resistance value into impedance with a high resistance value, and cooperating with the switch capacitor type frequency conversion band-pass filter body to promote voltage gain in a passing band and enhance the out-of-band interference rejection performance. The impedance bootstrapping frequency conversion band-pass filter is compatible with parasitic capacitors and bond-wire inductors of radio frequency input nodes.

Description

technical field [0001] The invention relates to the field of integrated circuit design, in particular to an impedance bootstrap frequency conversion bandpass filter. Background technique [0002] With the advancement and development of wireless communication, more and more wireless communication standards have entered our daily life. Various communications such as FM, WiFi, BlueTooth, cellular mobile communication (2G, 3G, 4G and even 5G), UWB, GPS, etc. The systems occupy precious and crowded spectrum resources respectively, and the spectrums occupied by different communication standards are often very close to each other, causing each other's out-of-band interference. [0003] For a receiver in a general sense, various filtering operations are required in the process from RF input to baseband digital output, such as off-chip pre-filtering, out-of-band interference suppression, channel selective filtering, and anti-aliasing filtering Wait, from the perspective of on-chip i...

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Problems solved by technology

[0008] In view of the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of impedance bootstrap frequency conversion band-pass filter, be used for solving the cumbersome and high cost of off-chip SAW filter in the prior art, even novel Frequency conversion bandpass filters also suffer from fatal performance-limiting problems

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