نتایج جستجو برای: frequency oscillator
تعداد نتایج: 508913 فیلتر نتایج به سال:
This paper describes a low-voltage, low-jitter clock synthesizer and a temperaturecompensated tunable oscillator. Both of these circuits employ a self-correcting Delay-Locked Loop (DLL) which solves the problem of false locking associated with conventional DLLs. This DLL does not require the delay control voltage to be set on power-up, it can recover from missing reference clock pulses and beca...
The effects of electron beam prebunching on the radiation buildup process in a free electron maser oscillator operating in a collective-Raman regime and oscillating in the frequency range of 4 to 5 GHz are studied. An electron beam is prebunched, accelerated to 70 keV, transported through a drift region, and injected into a linearly polarized wiggler in which FEL interaction takes place. Single...
A differential Colpitts oscillator using AlN MEMS CMR designed in 0.13 um CMOS is presented in this work. The oscillator operates at 1.16 GHz, with a total power consumption of 4.2 mW at 1 V supply. It achieves a phase noise of -143.6 dBc/Hz, 173.3 dBc/Hz at 100 kHz and 1 MHz offset frequency respectively with a figure of merit (FOM) of 228.3 dB. Current-based temperature compensation was emplo...
Abstract: In this paper, CMOS digitally controlled oscillator (DCO) design is analyzed for 4-16 bits. The CMOS DCO is designed based on a ring oscillator. Simulations of the analyzed DCO using 250nm CMOS technology achieve controllable different frequency range with a wide linearity. A 4-bit digitally controlled CMOS oscillator (DCO) design is best by adjusting the width of p-MOS and n-MOS devi...
Realization of a novel single-resistance-controlled oscillator, employing an active element and all grounded passive elements, is the purpose of this manuscript. With requirements for completing the design being only a single Voltage Differencing Current Conveyor and four grounded passive components, it is also a preferable choice for integrated circuit implementation. The designed circuit has ...
This paper demonstrates a pulse width controlled PLL without using an LPF. A pulse width controlled oscillator accepts the PFD output where its pulse width controls the oscillation frequency. In the pulse width controlled oscillator, the input pulse width is converted into soft thermometer code through a time to soft thermometer code converter and the code controls the ring oscillator frequency...
This thesis report presents system specification, such as frequency and output power level, and selection topology of an oscillator circuit suitable for a CMOS Integrated Doppler radar application, in order to facilitate short range target detection within 5-15 m range, using a 0.35 μm CMOS process. With this selected CMOS process, the frequency band at 2.45 GHz or 5 GHz, with a maximum output ...
In order to perform an on-chip test for characterizing both static and transmission parameters of embedded analog-to-digital converters (ADCs), this paper presents an oscillator-based reconfigurable sinusoidal signal generator which can produce both high and low frequency sinusoidal signals by switching the oscillator into different modes. Analog and digital signals can additionally be produced...
Abstrnct -A new fully balanced architecture for high-frequency, lownoise relaxation oscillators is presented. Differential operation is achieved with the use of two grounded capacitors utilizing the circuit parasitics. Bypassing of the regenerative memory function in the oscillator benefits both high-speed and low-noise operation. In addition a detailed analysis of phase noise in relaxation osc...
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