Proceedings ArticleDOI
A current tuneable fully differential transconductor dedicated for filtering applications
J.-C. Voghell,Mohamad Sawan +1 more
- pp 221-224
TLDR
In this article, a cross-coupled differential pairs input stage with folded cascode output stage is proposed to realize a high DC-gain integrator, which is preferred to the use of the negative resistance load (NRL) approach, since it is more stable and does not require another NRL circuit tuning.Abstract:
In this paper, a current tuneable fully differential transconductor cell (gm-C) dedicated for filtering applications is proposed The architecture used for this new cell is based on a cross-coupled differential pairs input stage with folded cascode output stage in order to realise a high DC-gain integrator This approach is preferred to the use of the negative resistance load (NRL) approach, since it is more stable and does not require another NRL circuit tuning when the overall transconductance of the cell is modified Realisation techniques for a gm-C high-order continuous-time filter are also discussed which allow full programmability of the centre frequency and the quality factor of the filter Finally, a design example of a 4th-order bandpass filter is presented with 33 V 035 /spl mu/m CMOS technology available through the Canadian Microelectronics Corporation (CMC)read more
Citations
More filters
Proceedings ArticleDOI
A design strategy for VHF filters with digital programmability
TL;DR: 2nd and 3rd-order Gm-C filters based on fully-balanced pseudo-differential continuous-time transconductors for applications in low-voltage systems over the VHF range are reported, which confirm the feasibility of the proposed strategy in applications such as data storage systems and IF strips.
Proceedings ArticleDOI
Pseudo-differential integrator for UHF applications in digital CMOS technologies
TL;DR: A programmable/tunable transconductor, based on a parallel connection of unit folded-cascode cells, which is used to implement a fully-balanced current-mode G/sub m/-C integrator to operate over the 30 MHz-220 MHz range with 80 dB of dynamic range for 1% of THD.
Proceedings ArticleDOI
Low voltage LC-ladder Gm-C low-pass filters with 42-215 MHz tunable range
TL;DR: Two low-pass filter approximations have been implemented with a cut-off frequency programmability from 42 to 215 MHz, which confirm the feasibility of the proposed strategy in applications such as data storage systems and IF strips.
Proceedings ArticleDOI
A Highly Linear OTA with 759 µS gm for RF Transceiver Application
TL;DR: A cross-coupled differential pair was taken from a single-ended OTA and utilized to form a fully differential OTA topology with two current mirrors to improve the linearity and the output common-mode voltage of the design OTA.
Journal ArticleDOI
Low-power, high-linearity transconductor with a high tolerance for process and temperature variations
TL;DR: A novel scheme for tunable complementary metal–oxide–semiconductor (CMOS) transconductor robust against process and temperature (PT) variations is presented and the effectiveness of PT compensation technique is proved.
References
More filters
Journal ArticleDOI
A linear fully balanced CMOS OTA for VHF filtering applications
TL;DR: In this paper, a linear, fully balanced, voltage-tunable CMOS operational transconductance amplifier (OTA) with large dc gain and wide bandwidth is described, which uses a two-differential-pair transconductor with a cross-coupled input stage together with a negative resistance load for compensating the parasitic output resistance of the OTA.
Journal ArticleDOI
A highly linear CMOS G/sub m/-C bandpass filter with on-chip frequency tuning
TL;DR: In this article, a fourteenth-order CMOS transconductance-C (G/sub m/-C) bandpass filter with on-chip automatic frequency tuning is described.
Proceedings ArticleDOI
Programmable current source dedicated to implantable microstimulators
TL;DR: In this article, a survey of programmable current source architectures based on miniaturized digital-to-analog converters (DAC) is elaborated to propose a new design dedicated to a visual microstimulator.
Proceedings ArticleDOI
A CMOS fully-balanced continuous-time IFLF filter design for read/write channels
D.H. Chiang,Rolf Schaumann +1 more
TL;DR: In this paper, the design and implementation method of a CMOS continuous-time inverse-follow-the-leader feedback (IFLF) filter are described, which permits the realization of arbitrary transfer functions.
Journal ArticleDOI
Matrix methods for the design of transconductor ladder filters
TL;DR: Matrix-based methods for the design of transconductor ladder filters are presented in this paper, which allow the realisation of any bandpass or lowpass prototype using only one or two values of transconductance.