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This paper proposes a fast, precise transient response and frequency characteristics simulation method for switching converters. This method uses a behavioral simulation tool (MATLAB/Simulink) without using a SPICE-like analog simulator. The nonlinear operation of the circuit is considered, and the nonlinear function is realized by defining the formula based on the circuit operation and by applying...
This article present the CMOS charge pump circuit which is operated in current mode. MOS transistors in this circuit act as the switches (charge transfer switch) and current source for store the charge from the supply voltage into the fly capacitor and transfer charge from the fly capacitor to the output (output capacitor and resistive load). All of the MOSFET which act as switch operated in saturation...
In this paper, a new current-mode (CM) single-input-three-output (SITO) universal filter based on single current-controlled current follower transconductance amplifier (CCCFTA) as active element and two capacitors, is presented. The proposed filter enables to realize all standard filter functions. Moreover, by expanding the CM filter via CCCFTA-based negative resistor, the CM quadrature oscillator...
A new current mirror based all-pass, tunable phase shifter architecture is proposed in 0.18 um CMOS, after a brief introduction on phase shifter applications, and comparison between different implementation methods. In the new current-mode approach the cut-off frequency of transistor is the operational limit of the proposed phase-shifter architecture and power consumption for this design is 80 microwatts...
Two first order all-pass filters with current input, current and voltage outputs employing single active element are proposed. Both the circuit uses grounded capacitor, suitable for IC implementation and provides current output at high impedance making them suitable for cascading. The proposed circuits are verified through PSPICE simulation using 0.35 mum TSMC parameters.
This paper proposes a low-power MOS current mode logic circuit with sleep-transistor to reduce the leakage current. The sleep-transistor is used to high-threshold voltage transistor to minimize the leakage current. The 16??16 bit parallel multiplier is designed with the proposed technology. Comparing with the previous MOS current model logic circuit, the circuit achieves the reduction of the power...
In this paper, current-mode filter using new active component, namely; current backward transconductance amplifier (CBTA) is presented. The proposed filter uses two resistors, two capacitors and only one CBTA. It has low active and passive sensitivities. The validity of the proposed circuit is demonstrated by PSPICE simulations and experimental results.
A novel structure, based on balanced differential-pair, is proposed to implement the CMOS CCCII with negative intrinsic resistance at port X. HSPICE simulations, based on the AMS's 0.35mu CMOS process, are conducted, which certainly confirm the occurrence of negative resistance. To demonstrate its capability, a two-phase current-mode oscillator is synthesized based on two lossless integrators. As...
A dynamic current-source control technique in multiple-valued current-mode (MVCM) circuits is proposed for a power-aware pipelined system. An output monitor in each pipeline stage detects that the combinational logic block has completed a computation for a particular piece of input data and its result has been stored into the pipeline register, and generates ldquooperation-completionrdquo signal....
A current-mode biquad filter employing dual-x second generation current conveyor as active element is presented. The proposed circuit has one input and three outputs and can simultaneously realize low-pass, band-pass and high-pass responses. The biquad employs three DXCCIIs, three triode MOSFETs and two grounded capacitors. It avails tunability via control voltages with aid of triode MOSFETs. PSPICE...
This article introduces a novel version for implementing current-mode precision full-wave rectifier. The features of the proposed circuit are that: it can rectify and amplify current signal with controllable output magnitude via an input bias current: the output current is free from temperature variation. In addition, direction of the output current signal can be arbitrarily controlled by controlled...
A genetical tuning scheme, implemented in MATLAB with the cooperation of HSPICE, is utilized to tune a capacitorless current-mode bandpass biquad employing a simple plusmn1.5V single-stage CMOS OTA, which is based on the AMSpsilas 0.35 mu CMOS process. The abilities of biquad, indicating the feasibility of such requirements, are examine through the extreme bias conditions. The very complex estimation...
In this paper, a new dual-output second generation current conveyor (DO-CCII) circuit based-on resistive compensation technique is proposed. The resistive compensation technique is very simple and powerful technique used to improve bandwidth of CMOS DO-CCII without extra power consumption. PSpice simulations for MIETEC 0.5 mum CMOS technology show that the current mode and voltage mode bandwidths...
Current mode (CM) scheme provides suitable alternative for the high speed on-chip interconnect signaling. This paper presents a energy-delay optimization methodology for the current-mode (CM) signaling scheme. Optimization for the CM circuits for on-chip interconnects requires a joint optimization of driver and receiver device sizes, as their parameters which affect the energy-delay performance depend...
A low-power and low-voltage simple CMOS exponential function generator circuit is proposed. It is based on simple current mirrors able to operate at low supply voltage. The design of the circuit is based on Taylor series expression for realizing the exponential characteristic and of MOS transistor operating in the saturation region. Simulation using the PSPICE program with 0.5 mum CMOS model of MIETEC...
A new current-mode function generator circuit will be presented, having a much smaller complexity per function with respect to the previous reported similar works. The circuit allows to compute an important number of mathematical functions using their n-th order limited polynomial series expansion. The approximation error could be strongly decreased by increasing the number of terms considered in...
A new structure of a current-mode LP active filter in CMOS technology, suitable for applications in very low frequency filters is presented in the paper. On the basis of this structure, particular solution of a sixth-order Bessel filter has been designed and tested by SPICE simulations. The main features of this design are; very low cutoff frequency (2.4 Hz), very low dissipation power (9 nW) and...
The current-mode instrumentation amplifier based on second-generation current conveyors (CCII) offers many benefits over conventional instrumentation amplifier architectures. It does not need any matched components to achieve high CMRR and its bandwidth is not gain-bandwidth product limited. Therefore, the wideband CMOS current conveyor has been used in this structure. HSPICE simulations have shown...
In this paper a novel current-mode square-root circuit with reduced short-channel effect is proposed. It's suitable for standard CMOS fabrication and analog systems. The proposed circuit which has been simulated with SPICE simulator in 0.35 mum CMOS technology, decreases the output current errors of the square-root circuit especially employing short-channel MOS transistors
This paper aims at the development of floating gate MOSFET (FGMOS) based low voltage (plusmn 0.75 V), voltage-mode and current-mode circuits. Using low voltage CCII, impedance converter has been realized, which is used to simulate high value of inductance for at least 100 kHz. This circuit has also been used as capacitance multiplier. Some new bandpass filter circuits have also been presented. The...
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