By Topic

Circuits and Systems II: Express Briefs, IEEE Transactions on

Issue 4 • Date April 2011

Filter Results

Displaying Results 1 - 16 of 16
  • Table of contents

    Publication Year: 2011 , Page(s): C1
    Save to Project icon | Request Permissions | PDF file iconPDF (40 KB)  
    Freely Available from IEEE
  • IEEE Transactions on Circuits and Systems—II: Express Briefs publication information

    Publication Year: 2011 , Page(s): C2
    Save to Project icon | Request Permissions | PDF file iconPDF (39 KB)  
    Freely Available from IEEE
  • High-Efficiency Differential RF Front-End for a Gen2 RFID Tag

    Publication Year: 2011 , Page(s): 189 - 194
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (489 KB) |  | HTML iconHTML  

    This brief proposes the analysis and design of a high-efficiency differential radio-frequency (RF) front-end for electronic-product-code second-generation-compatible RF identification tags. By studying the operating mechanism of an N-stage rectifier using a dynamic compensation technique, we propose a steady-state model to predict its output voltage and power conversion efficiency (PCE). Th... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Transmission-Line Class-E Power Amplifier With Extended Maximum Operating Frequency

    Publication Year: 2011 , Page(s): 195 - 199
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (401 KB) |  | HTML iconHTML  

    A novel Class-E power amplifier (PA) topology with transmission-line load network is presented in this brief. When compared with the classic Class-E topology, the new circuit can increase the maximum operating frequency up to 50% higher without trading the other Class-E figures of merit. Neither quarterwave line/massive radio-frequency choke for collector/drain biasing nor additional fundamental-f... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Low-Power Divider Retiming in a 3–4 GHz Fractional-N PLL

    Publication Year: 2011 , Page(s): 200 - 204
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (343 KB) |  | HTML iconHTML  

    The resynchronization of a frequency divider output is routinely used in the design of low-noise phase-locked loops (PLLs) in order to remove additional phase noise and avoid modulus-dependent nonlinearity. However, metastability issues cause PLLs to fail to lock or to degrade jitter at certain synthesized frequencies. This brief proposes a novel automatic retiming circuit, which mitigates metasta... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A High-IIP3 Third-Order Elliptic Filter With Current-Efficient Feedforward-Compensated Opamps

    Publication Year: 2011 , Page(s): 205 - 209
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (520 KB) |  | HTML iconHTML  

    A low-distortion active filter is realized using current-efficient feedforward-compensated operational amplifiers in the integrators and feedforward current injection in the summing amplifier. A third-order elliptic low-pass filter with two possible bandwidth settings of 17 and 8.5 MHz consumes 1.8 mW from a 1.8-V supply and occupies 0.17 mm2 in a 0.18- μm CMOS process. The measu... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Study of a Dual-Mode Ring Oscillator

    Publication Year: 2011 , Page(s): 210 - 214
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (416 KB) |  | HTML iconHTML  

    An analytical investigation of a dual-mode ring oscillator is presented. The ring oscillator is designed using a CMOS 0.18-μm technology with differential eight-stage delay cells employing auxiliary input devices. With a proper startup control, the oscillator operates in two different modes covering two different frequency bands. A nonlinear model, along with the linearization method, is us... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Probabilistic Estimation Bias Circuit for Fixed-Width Booth Multiplier and Its DCT Applications

    Publication Year: 2011 , Page(s): 215 - 219
    Cited by:  Papers (11)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (592 KB) |  | HTML iconHTML  

    In this brief, a probabilistic estimation bias (PEB) circuit for a fixed-width two's-complement Booth multiplier is proposed. The proposed PEB circuit is derived from theoretical computation, instead of exhaustive simulations and heuristic compensation strategies that tend to introduce curve-fitting errors and exponential-grown simulation time. Consequently, the proposed PEB circuit provides a sma... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Area-Efficient Prefilter Architecture for a CDMA Receiver

    Publication Year: 2011 , Page(s): 220 - 224
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (392 KB) |  | HTML iconHTML  

    This brief proposes an area-efficient memory-based prefilter delay line structure. A prefilter-rake chip-level equalizer is used in a code-division multiple-access receiver to deal with multiple-access interference. A prefilter, which functions as an adaptive filter, has a sparsity property, where the number of taps with nonzero coefficients is much smaller than the number of whole taps. On the ba... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Hardware-Oriented Algorithm for Quaternion-Valued Matrix Decomposition

    Publication Year: 2011 , Page(s): 225 - 229
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (138 KB) |  | HTML iconHTML  

    In this brief, a generalized form for 2-, 4-, and 8-D coordinate rotation digital computer (CORDIC) rotation matrices is suggested, and a novel highly parallel efficient hardware-oriented 8-D octonion CORDIC algorithm for quaternion-valued matrix decomposition is designed and presented. Furthermore, a successful sequence of iterations with guaranteed convergence is determined, and the hardware imp... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Reexamination of SRAM Cell Write Margin Definitions in View of Predicting the Distribution

    Publication Year: 2011 , Page(s): 230 - 234
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (528 KB) |  | HTML iconHTML  

    Four definitions of static random access memory (SRAM) cell write margins (WMs) were reexamined by analyzing the dependence of the WM on the SRAM cell transistor threshold voltages (Vth's) in order to find a preferable definition. The WM is expected to obey the normal distribution if the differential coefficients of the WM to Vth's are constant over a wide range of Vth variations. This means that ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Sensor System to Detect Positive and Negative Current-Temperature Dependences

    Publication Year: 2011 , Page(s): 235 - 239
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (468 KB) |  | HTML iconHTML  

    We present a sensor system that determines if the circuit current-temperature (I - T) dependence is positive or negative. While prior temperature sensors can prevent overheating and temperature-induced timing failures in systems with negative I - T dependences, the proposed sensor system can prevent these issues in systems with negative or positive I - T d... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A New Chaotic Jerk Circuit

    Publication Year: 2011 , Page(s): 240 - 243
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (588 KB) |  | HTML iconHTML  

    Much recent interest has been given to simple chaotic oscillators based on jerk equations that involve a third-time derivative of a single scalar variable. The simplest such equation has yet to be electronically implemented. This paper describes a particularly elegant circuit whose operation is accurately described by a simple variant of that equation in which the requisite nonlinearity is provide... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A High Current Accuracy Boost White LED Driver Based on Offset Calibration Technique

    Publication Year: 2011 , Page(s): 244 - 248
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (709 KB) |  | HTML iconHTML  

    The current accuracy and power efficiency of a boost white light-emitting-diode (WLED) driver are usually design tradeoffs since the power efficiency is inversely proportional to the reference voltage, whereas the current accuracy is proportional to the reference voltage. Traditionally, a boost WLED driver with high current accuracy and high power efficiency demand a large chip area because mismat... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • IEEE Circuits and Systems Society Information

    Publication Year: 2011 , Page(s): C3
    Save to Project icon | Request Permissions | PDF file iconPDF (33 KB)  
    Freely Available from IEEE
  • IEEE Transactions on Circuits and Systems—II: Express Briefs Information for authors

    Publication Year: 2011 , Page(s): C4
    Save to Project icon | Request Permissions | PDF file iconPDF (33 KB)  
    Freely Available from IEEE

Aims & Scope

TCAS II publishes brief papers in the field specified by the theory, analysis, design, and practical implementations of circuits, and the application of circuit techniques to systems and to signal processing. Included is the whole spectrum from basic scientific theory to industrial applications. The field of interest covered includes:

  • Circuits: Analog, Digital and Mixed Signal Circuits and Systems  
  • Nonlinear Circuits and Systems, Integrated Sensors, MEMS and Systems on Chip, Nanoscale Circuits and Systems, Optoelectronic
  • Circuits and Systems, Power Electronics and Systems
  • Software for Analog-and-Logic Circuits and Systems
  • Control aspects of Circuits and Systems. 

Full Aims & Scope