Journal Article10.1049/IET-CDS:20080225
Selection of the common-mode feedback network connection of fully differential Gm-C filters
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TL;DR: This work presents a systematic method for checking the stability condition and identifying the most suitable CMFB network connection for a particular FD Gm-C filter and demonstrated that the CMFBnetwork connection that provides highest CM rejection is not necessarily the conventional arrangement commonly used in FD G m-C design.
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Abstract: It is well known that fully differential (FD) structures have many advantages over their single-ended counterparts. However, the main disadvantage of FD circuit is the potential instability caused by the inherent common-mode (CM) positive feedback loop. To solve such an instability problem, extra common-mode feedback (CMFB) and/or common-mode feedforward (CMFF) circuitries are often incorporated to stabilise the circuits. We present a systematic method for checking the stability condition and identifying the most suitable CMFB network connection for a particular FD Gm-C filter. It has been demonstrated that the CMFB network connection that provides highest CM rejection is not necessarily the conventional arrangement commonly used in FD Gm-C design.
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Citations
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Relationship between common-mode rejection and differential-mode distortion in fully differential Gm-C filters
TL;DR: A relationship between common-mode rejection and differential-mode distortion of the fully differential ladder Gm-C filters employing pseudo-differential transconductors is investigated and it was found that by varying the common- mode gain from 0 to 1, the HD3 of the odd- order filters and even-order filters are decreased and increased.
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Design of new highly linear OTA for OTA-C filters
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TL;DR: A new highly linear OTA is designed for OTA-C filters, featuring a high linear trans-conductance input range and improved common mode feedback strategy, achieving a DC-gain of 76 dB and CMRR of 140 dB.
References
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TL;DR: In this article, a linear, tunable integrator for very high-frequency integrated filters can be made, which has good linearity properties and non-dominant poles in the gigahertz range owing to the absence of internal nodes.
A broad-band tunable CMOS channel-select filter for a low-IF wireless receiver
F. Behbahani,Weeguan Tan,A. Karimi-Sanjaani,A. Roithmeier,Asad A. Abidi +4 more
- 16 May 1999
TL;DR: In this article, the authors describe a filter designed for a wideband wireless LAN receiver operating in the 2.4-2.48 GHz ISM band, where linearity is specified as out-of-band 3rd order intercept (IP3), to limit the in-band intermodulation from large interferers lying in the filter stop band.
118
Linear CMOS transconductance element for VHF filters
Bram Nauta,Evert Seevinck +1 more
TL;DR: In this article, a differential transconductance element based on CMOS inverters is presented, which is a linear, tunable integrator for very high-frequency continuous-time integrated filters.
A CMOS gyrator low-IF filter for a dual-mode Bluetooth/ZigBee transceiver
TL;DR: A low-IF polyphase channel filter for a dual-mode Bluetooth/Zigbee transceiver that employs novel transconductor and preamplifier designs and achieves image band rejection and spurious-free dynamic range.
92
A 3 V 12-55 MHz BiCMOS pseudo-differential continuous-time filter
TL;DR: In this article, a second-order low-pass continuous-time filter operating at a 3 V power supply is presented, where the output common mode voltage is controlled at the filter level using lossy integrators.
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