ICCSC'02. 1st IEEE International Conference on Circuits and Systems for Communications. Proceedings (IEEE Cat. No.02EX605)
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A fully differential CMOS OTA for continuous-time filter applications
- Trang 42-45
A CMOS operational transconductance amplifier (OTA) operating from single 3.3 V
power supply is desirable for continuous-time filter applications. The developed
OTA has been used in 100 kHz fifth-order, elliptic filter based on RLC ladder
prototype. Input stage of OTA works as degenerated MOS differential pair with
new concept of active MOS resistance. PSPICE (models BSIM3v3) simulations and
measu...
#Filters #Transconductance #Operational amplifiers #Power amplifiers #Power supplies #Prototypes #SPICE #Semiconductor device modeling #Electrical resistance measurement #Semiconductor device measurement
Nonequilibrium 1/f noise and problems of submicron technology of high reliability microcircuits
- Trang 400-403
A proposition is put forward that nonequilibrium fluctuations of reactive energy
(electric and magnetic) in crystal areas are causing deterioration of the
reliability of elements due to the decrease in their sizes. We assume that those
fluctuations and the known 1/f noise are same. The lowest frequency of 1/f
fluctuations of energy is defined by the microcircuit operating duration.
Inevitably the ...
#Fluctuations #Equations #Frequency #Magnetic noise #Circuit testing #Physics #Thermodynamics #Reactive power #Parasitic capacitance #Voltage
DCT processor architecture based on computation sharing
- Trang 162-165
In this paper, we present a new discrete cosine transform (DCT) processor
architecture using computation sharing multiplication (CSHM). We introduce a
computation sharing multiplier based DCT architecture to achieve image quality
and hardware complexity trade-off and analyze the performance. Comparison of the
performance, area and power consumption with a DA (distributed arithmetic) based
DCT arch...
#Discrete cosine transforms #Computer architecture #Image quality #Signal processing algorithms #Energy consumption #Image coding #Matrix decomposition #Power engineering computing #Computational Intelligence Society #Hardware
Comparison of transistor-based power amplifier amplitude response linearization methods
- Trang 98-101
In this paper three linearization methods of power amplifier (PA) amplitude
response (AM/AM characteristic) are considered: predistortion, gate bias control
and supply voltage control of the LDMOS transistor-based PA. For all three cases
functional dependences of input voltage, gate bias voltage and supply voltage,
which allow one to linearize amplitude response, are determined, and also are
found...
#Power amplifiers #Voltage control #Predistortion #Nonlinear distortion #Automatic control #Student members #Informatics #Communication system control #Linear feedback control systems #Concrete
Limited signals forming with the given accuracy in the systems under disturbances
- Trang 378-381
For the solving of various control tasks, the problem connected with formation
of limited signals with acceptable properties often appears. We have similar
problems for the realization of some control systems, and also for the
production of signals which have informational characteristics intended for the
appropriate information provision for various systems. Thus, it is very
important that the re...
#Control systems #Control system synthesis #Signal synthesis #Signal resolution #Problem-solving #Vectors #Nonlinear control systems #Constraint theory #Jacobian matrices
Smart low-power CMOS cameras for 3G mobile communicators
- Trang 216-225
The paper presents the concept of a smart multifunctional low-power camera for
3G mobile communicators and Personal Digital Assistants. The device is composed
of an ultra low-power image sensor featuring a large intra-scene dynamic range
and a high sensitivity, so as to ensure proper image acquisition under possibly
severe illumination conditions, as encountered in mobile. Further embedded
functio...
#Smart cameras #CMOS image sensors #Digital cameras #Personal digital assistants #Image sensors #Dynamic range #Lighting #Image coding #Authentication #Access control
Analyzing the impact of substrate noise on embedded analog-to-digital converters
- Trang 82-85
This paper presents the analysis and measurements of the impact of digital
substrate noise on embedded Analog-to-Digital converters. The impact of
substrate noise on analog design is explained, followed by a specific entire
impact analysis of the impact on a regenerative comparator and an A/D converter.
To confirm the analysis the substrate noise has also been measured on a test
chip designed in a...
#Analog-digital conversion #MOSFETs #Noise measurement #Circuit noise #Semiconductor device measurement #Voltage #Equations #CMOS technology #Noise generators #Topology
Modified log-domain oscillator for chaos
- Trang 287-290
A new chaotic oscillator with double-scroll dynamics based on an existing
log-domain oscillator is presented. The circuit does not employ any PNP
transistors hence it can be implemented in cheap bipolar processes, which do not
offer high-quality vertical PNPs. Furthermore, the circuit operates in
current-mode and thus is well suited for integrated circuit implementation. The
oscillator also enjoys...
#Oscillators #Chaos #Chaotic communication #Circuit synthesis #Control system synthesis #Bifurcation #Resistors #Filters #Integrated circuit modeling #Bipolar transistor circuits
VLSI design of CMOS image-reject LNA for 950-MHz wireless receivers
- Trang 330-333
This paper presents the design of a CMOS integrated image reject low noise
amplifier (IR-LNA) for application to 950 MHz low power, low voltage wireless
receivers. A second-order active band-pass filter using an integrated inductor
is incorporated into the LNA core to reject the 1.6 GHz image signal without
achieving high Q values. The circuit proves to be suitable for highly integrated
CMOS recei...
#Very large scale integration #CMOS technology #Low-noise amplifiers #Low voltage #Band pass filters #Active inductors #Wideband #Integrated circuit technology #Gain #Noise figure
Reconfigurable hardware accelerator for a universal Reed Solomon codec
- Trang 158-161
This paper presents a hardware accelerator for a universal Reed Solomon codec
which can be configured to behave as an encoder or decoder for any RS(n, k, t)
code with programmable field dimension m. For this purpose a hardware-software
codesign approach is followed. A general C implementation of the scheduling for
any RS(n, k, t) code which initially configures the accelerator, gives
comparable pe...
#Hardware #Reed-Solomon codes #Codecs #Read-write memory #Random access memory #Digital signal processing #Decoding #Galois fields #Accelerator architectures #Clocks