• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Frequency Response of Sensors
Frequency Response of Sensors

... measurement is to choose one that, when installed, has a natural frequency at least 10 times that of the highest frequency to be measured. In this way, measurement errors can always be assumed to be less than 1% which is generally accurate enough for most engineering purposes. This value of l/i 0 th ...
LTC1069-1 - Low Power, 8th Order Progressive Elliptic, Lowpass Filter
LTC1069-1 - Low Power, 8th Order Progressive Elliptic, Lowpass Filter

... ground plane should be connected to any digital ground at a single point. For dual supply operation Pin 1 should be connected to the analog ground plane. For single supply operation Pin 1 should be bypassed to the analog ground plane with a 0.47μF or larger capacitor. An internal resistive divider b ...
ISSCC 2015 / SESSION 25 / RF FREQUENCY GENERATION FROM
ISSCC 2015 / SESSION 25 / RF FREQUENCY GENERATION FROM

... This paper presents an all-digital phase-locked loop (PLL) using a voltage-domain digitization realized by an analog-to-digital converter (ADC). It consists of an 18b Class-C digitally-controlled oscillator (DCO), 4b comparator, digital loop filter (DLF), and frequency-locked loop (FLL). Implemented ...
Implementation of Digital Pulse Width Modulators using
Implementation of Digital Pulse Width Modulators using

... for control applications. The main use is to control the power supply to the electrical devices. The digital pulse width modulators are the basic building block in digital control applications. The advantages of DPWM are reliability, flexibility and expandability and it is independent of aging. Seve ...
free-running dielectric resonator oscillators
free-running dielectric resonator oscillators

... MITEQ’s DRO circuits utilize both silicon bipolar transistors and GaAs MESFET devices. All microwave oscillators are designed by adding resonating elements (L, C or R) in various configurations to different ports of a transistor. These elements generate a negative resistance at a certain resonant fr ...
L23-Clock Tree Synthe..
L23-Clock Tree Synthe..

... synchronous block(SBs) which communicate with each other on an asynchronous basis. By eliminating the global clock, we eliminate a major source of power consumption and a design bottleneck. GALS approach is skew tolerant at global level because it does not depend on a global clock reference for comm ...
Set Reset J K Q Q` CLK
Set Reset J K Q Q` CLK

... integrated over the exposure time. But when it comes to reading out the chip a clock signal starts which steers a circuit to push with each clock cycle the collected charges row-wise to the neighbouring pixels. (Abusing the above timing diagram: imagine the line Q0 to represent one of the columns of ...
PDF: Introduction to Receivers
PDF: Introduction to Receivers

... (IIP3) is a figure of merit that is directly related to the intermodulation distortion produced by a particular design. ...
PPTX
PPTX

... If CLKFB is used, the phase of CLKFX and CLKIN will be locked – For every M cycles of CLKFX, there will be D cycles of CLKIN – The phase of the corresponding edge will be phase related according to the phase shift settings of the DCM – CLKFB can be left unconnected if no phase relationship is requir ...
SGC-6289Z 数据资料DataSheet下载
SGC-6289Z 数据资料DataSheet下载

... RF MICRO DEVICES®, RFMD®, Optimum Technology Matching®, Enabling Wireless Connectivity™, PowerStar®, POLARIS™ TOTAL RADIO™ and UltimateBlue™ are trademarks of RFMD, LLC. BLUETOOTH is a trademark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks and ...
frequency modulator
frequency modulator

... The filtered output adjusts the VCO frequency in an attempt to correct for the original frequency or phase difference. ...
Section H5: High-Frequency Amplifier Response
Section H5: High-Frequency Amplifier Response

... Again, in some instances in the following discussion, I will be using slightly different notation and taking a different approach than your author. As usual, if this results in confusion, or you are more comfortable with his technique, let me know and we’ll work it out. High Frequency Response of th ...
Clock distribution
Clock distribution

... Cause lots of noise (cross talk due to high frequency) Must try to specify, demand special treatment and lay out the clock distribution network first Use thicker line or isolation grid to make bigger separation from other signals Use a separate layer Clock distributions (v.9a) ...
Fourier theory made easy (?)
Fourier theory made easy (?)

... a different frequency of sampled signal ...
Using RSI format
Using RSI format

... quartz-crystal microbalance 共QCM兲 has been used as a sensitive device for the measurement of small mass changes.2,3 Presently, it is applied, e.g., for the monitoring of thin film growth in deposition and sputter processes.4–7 In recent years, a variety of QCM applications in gaseous and liquid envi ...
MP11 High Sensitive Metal Detector for Detecting Metal Objects
MP11 High Sensitive Metal Detector for Detecting Metal Objects

... (Better Security System for to Detect Terrorists / Human Bombs) One of the simplest methods of metal detecting is by beat frequency oscillator. Basically, the circuit consists of two balanced oscillator. One oscillator provides the reference signal, and other oscillator is acting as the detector ele ...
SGC2463Z 数据资料DataSheet下载
SGC2463Z 数据资料DataSheet下载

... Test Conditions: VD =3V, ID =26mA Typ., OIP3 Tone Spacing=1MHz, POUT per tone=-5dBm, TL =25°C, ZS =ZL =50 ...
Control of G4JNT AD9850 Direct Digital Synthesizer module
Control of G4JNT AD9850 Direct Digital Synthesizer module

... PIC and is primarily intended for when the DDS module is used as the local oscillator for a zero IF based receiver / transmitter with I/Q LO drive. No error checking on data validity is performed, and when in *4 mode the requested frequency can only have a value up to 40% / 4 of the clock, ie. no h ...
SGC2363Z 数据资料DataSheet下载
SGC2363Z 数据资料DataSheet下载

... RFMD’s SGC2363Z is a high performance SiGe HBT MMIC amplifier utilizing a Darlington configuration with a patented active-bias network. The active bias network provides stable current over temperature and process Beta variations. Designed to run directly from a 3V supply, the SGC2363Z does not requi ...
Zeeman Tunable Saturated Absorption Spectroscopy Cell for
Zeeman Tunable Saturated Absorption Spectroscopy Cell for

... velocity, and proceeds to absorb more blueshifted photons. Over time, the random velocities average out to zero, and the sample of atoms becomes cooled as the average thermal velocity decreases. Since laser cooling is a process that takes advantage of atomic transitions, the trap lasers must remain ...
Synchronous_Design
Synchronous_Design

... • All flip-flops clocked by one common clock • Reset only used for initialization • Races and hazards are no problem ...
Application Considerations for an Instrumentation Lowpass Filter
Application Considerations for an Instrumentation Lowpass Filter

... Figure 2 shows the high accuracy of the passband response for values of 1/2πRC around (fC/1.62). If maximum flatness is required, the (R • C) product should be well controlled. Figures 3 and 4 are similar to Figure 2 but with wider range of (1/2πRC) values. When the input (R, C) cutoff frequency appr ...
An Effective Model of Bucket- Brigade Device-Based
An Effective Model of Bucket- Brigade Device-Based

... should be used ○ Downsampling/upsampling more realistic ○ Delay line of fixed length with "virtual" BBD clock source is most accurate and gives pitch shifting when changing the delay time for free ...
fpga implementation of phase locked loop (pll) with
fpga implementation of phase locked loop (pll) with

... mixed signal circuits as well as digital blocks. As the complexity of a system grows, it becomes more and more important to implement the system simulation and top-down design methodology as well. In this paper, we have designed a phase locked loop using Verilog and Xilinx .Considering the rapid gro ...
SGA5286Z 数据资料DataSheet下载
SGA5286Z 数据资料DataSheet下载

... Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause permanent damage to the device. Extended application of Absolute Maximum Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Abs ...
< 1 ... 10 11 12 13 14 15 16 17 18 ... 22 >

Atomic clock



An atomic clock is a clock device that uses an electronic transition frequency in the microwave, optical, or ultraviolet region of the electromagnetic spectrum of atoms as a frequency standard for its timekeeping element. Atomic clocks are the most accurate time and frequency standards known, and are used as primary standards for international time distribution services, to control the wave frequency of television broadcasts, and in global navigation satellite systems such as GPS.The principle of operation of an atomic clock is not based on nuclear physics, but rather on atomic physics; it uses the microwave signal that electrons in atoms emit when they change energy levels. Early atomic clocks were based on masers at room temperature. Currently, the most accurate atomic clocks first cool the atoms to near absolute zero temperature by slowing them with lasers and probing them in atomic fountains in a microwave-filled cavity. An example of this is the NIST-F1 atomic clock, one of the U.S.'s national primary time and frequency standards.The accuracy of an atomic clock depends on two factors. The first factor is temperature of the sample atoms—colder atoms move much more slowly, allowing longer probe times. The second factor is the frequency and intrinsic width of the electronic transition. Higher frequencies and narrow lines increase the precision.National standards agencies in many countries maintain a network of atomic clocks which are intercompared and kept synchronized to an accuracy of 10−9 seconds per day (approximately 1 part in 1014). These clocks collectively define a continuous and stable time scale, International Atomic Time (TAI). For civil time, another time scale is disseminated, Coordinated Universal Time (UTC). UTC is derived from TAI, but approximately synchronised, by using leap seconds, to UT1, which is based on actual rotation of the Earth with respect to the solar time.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report