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Intel® introduced an energy efficient SoC power delivery scheme utilizing fully-integrated high-frequency voltage regulators along the roadmap of Moore's law scaling. From 22nm process to 14nm or even 10nm, circuit blocks shrink and the embedded passives are scaled sequentially in the similar manner. A major challenge in the on-die VR design is to achieve sufficient integration and minimization of...
In wireless communication system the phase locked loop plays important role, specially Voltage Controlled Oscillator. It is an electronic device which is used for the purpose of generating a signal. Applications range is very vast, which includes clock generation in various microprocessors to carrier synthesis in cellular telephones, requiring a large range of different oscillators/signal generation...
The immense work presented in this paper is a high frequency sinusoidal oscillator using positive second generation current controlled conveyor (CCCII+) with minimum passive components. CCCII is implemented using single Current Feedback Operational Amplifier (CFOA) and single Operational Trans-conductance Amplifier (OTA). The frequency (time period) of CCCII is tuned to a maximum of 4 MHz using external...
In this paper presents the design and analysis of Conventional Operational Transconductance Amplifier for use in novel FinFET based OTA. OTA is an analog circuit and it has differential input voltage controlled current source (VCCS). OTA is a basic building block in analog circuit. In this, paper we focus on different-different supply voltage to find such type parameter like leakage power, integrated...
A CMOS voltage differencing differential difference amplifiers (VDDDAs) based voltage-mode quadrature sinusoidal oscillator is proposed. The proposed oscillator is based on the two integrator loop configuration with amplifier wherein the frequency of oscillation (FO) is tuned by the time constant of two integrator and the condition of oscillation (CO) is tuned by gain of amplifier. It is constructed...
An alternative topology of voltage-mode sinusoidal quadrature oscillator based on VDGA (voltage differencing gain amplifier) is proposed. The proposed quadrature oscillator consisting of two VDGAs and two grounded capacitors with the absence of the external passive resistors can generate two sinusoidal output voltages with 90° phase difference. The oscillation condition and oscillation frequency (ωo)...
This paper presents an adaptive equalizer based on dual-loop balancing technique and a third order nested feedback equalizing filter to achieve data rate up to 10Gb/s without using inductors. A spectral balancing circuit adjusts the equalizer boost, while a second servo loop automatically tracks the data rate using self-calibration and re-tunes the filters for optimal equalization. Third order nested...
Brain-inspired non-Boolean computing paradigms are gaining wide interest due to their error resilient nature and massive parallelism. This work explores oxide-based compact oscillators for oscillatory neural networks (ONN). We demonstrate for the first time, best in class high-frequency performance at 500 MHz and low power (< 200 µW). The superior figures of merit are achieved due to device engineering...
This work presents a highly stable monolithic integrated CMOS LC-based frequency reference. The frequency reference is based on a Self-Compensated Oscillator (SCO) architecture where the LC tank operates at a specific phase Phi-NULL where frequency sensitivity versus temperature is minimum. A new compensation technique is applied over Phi-Null to further optimize frequency stability and extend the...
In this paper, a PVT Insensitive Time to Digital Converter is proposed to provide a stable reference clock signal of a phase-locked loop. The time resolution can be independent on process, voltage, and temperature variations. In order to produce 16-phase signals, eight series of differential delay elements are utilized. Then, interpolated architecture is used to increase the reference frequency such...
This paper presents a radiation-hardened-by-design (RHBD) phase-locked loop (PLL) which utilizes a feedback voltage controlled oscillator (FBVCO) to mitigate a single event transient (SET) strike. Whenever the SET pulse attacks the input control voltage of VCO, VCO gives rise to a frequency disturbance and PLL produces a huge jitter at the output clock. The proposed FBVCO consists of an open loop...
The paper presents a reconfigurable fully differential all pass filter based on CMOS differential voltage current conveyor. The proposed topology uses two differential voltage current conveyors along with two resistors and two capacitors. The phase angle of the realized fully differential all pass filter can be controlled through an n-bit digital control word. Thus the proposed filter topology provides...
A digital phase locked loop (DPLL) has been developed in which the phase detection is performed by a bangbang phase detector (BBPD). By dithering the offset of the BBPD, its phase detection gain can be made to be constant and independent of the reference clock jitter. Therefore the bandwidth of the DPLL can be kept constant regardless of the magnitude of the reference clock jitter. The DPLL with the...
This paper presents a new third-order quadrature oscillator using operational transresistance amplifiers as active elements. The proposed circuit provides high precision of the frequency of oscillation. The frequency of oscillation can be controlled using a single passive component and the condition of oscillation can be controlled orthogonally by setting the circuit components. Also two quadrature...
This paper proposes a novel high frequency ring oscillator. The proposed ring oscillator consists of CMOS inverters which use simple capacitor based level shift circuits. The level shift circuit consists of only a capacitor and a MOSFET. Its power consumption is ideally zero. Thanks to the level shift circuits, transconductance and drain conductance of MOSFETs in CMOS inverters increase and high oscillation...
We present a new method to phase-modulate RF pulses through injection locking. The modulator can produce BPSK or QPSK modulated pulses over a frequency span of 3 to 10 GHz. The RF pulses are produced using a fast on/off switching technique to power up and power down a tunable ring oscillator. Experiments show that the modulator's energy consumption ranges from 13 pJ/pulse to 18 pJ/pulse as the carrier...
The quadrature sinusoidal oscillator employing two voltage differencing tranconductance amplifiers (VDTAs) has been proposed. The condition of oscillation (CO) and frequency of oscillation (FO) can be independently controlled by adjusting the bias current of two VDTAs. The oscillator can provide two output voltages as quadrature waveform and one output current with magnitude controllability. It consists...
In this paper, square wave generator using a single second generation differential current conveyor (DCCII) is proposed. The proposed square wave generator consists of two resistors and a single grounded capacitor. CMOS gpdk 180 nm technology was used for designing the proposed circuit. The mathematical analysis, simulation results and experimental results of the proposed circuit are discussed. And...
In this paper a current- and voltage-mode third-order quadrature oscillator circuit using current and voltage conveyors is presented. The features of the new circuit are the oscillation frequency control non-interactive to the condition of oscillation, the use of only grounded passive elements, and the possibility of both quadrature current and voltage outputs. Using the CMOS implementation of the...
A mixed-mode three phase sinusoidal oscillator (MTSO) employing Second Generation Dual-X Current Conveyor (DXCCII) as the active element is presented. A feedback scheme consisting of two lossy integrators followed by a lossless inverting integrator is employed to obtain three voltage-mode and three current-mode sinusoidal signals simultaneously. The oscillation conditions and oscillation frequencies...
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