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frequency-offset

ISM射頻產品的晶體頻率計算

Abstract: Many industrial/scientific/medical (ISM) band radio frequency (RF) products use crystal oscillators to generate areference for the phase-locked loop (PLL)-based local oscillator (LO). This tutorial provides a basic description of theISM-RF Crystal Calculator, which can be used to calculate various impacts on crystal frequency accuracy and startupmargin for such an LO.

標簽： ISM 射頻晶體頻率計算

上傳時間： 2013-11-15

上傳用戶：JasonC
雙絞線和低通濾波器降低EMI_RFI

Abstract: Alexander Graham Bell patented twisted pair wires in 1881. We still use them today because they work so well. In addition we have the advantage ofincredible computer power within our world. Circuit simulators and filter design programs are available for little or no cost. We combine the twisted pair and lowpassfilters to produce spectacular rejection of radio frequency interference (RFI) and electromagnetic interference (EMI). We also illustrate use of a precision resistorarray to produce a customizable differential amplifier. The precision resistors set the gain and common mode rejection ratios, while we choose the frequencyresponse.

標簽： EMI_RFI 雙絞線低通濾波器

上傳時間： 2014-11-26

上傳用戶：Vici
LFRD003水表自動抄表(AMR)的參考設計

Abstract: This reference design provides a complete demonstration platform for using industrial/scientific/medical radio frequency

標簽： LFRD 003 AMR 水表

上傳時間： 2013-11-09

上傳用戶：LP06
時鐘切換電路英文資料.

With more and more multi-frequency clocks being used in today's chips, especially in the communications field, it is often necessary to switch the source of a clock line while the chip is running.

標簽： 時鐘切換電路英文

上傳時間： 2013-10-10

上傳用戶：1214209695
高精度I2C實時時鐘的設計

Abstract: This application note presents an overview of the operational characteristics of accurate I²C real-time clocks (RTCs),including the DS3231, DS3231M, and DS3232. It focuses on general application guidelines that facilitate use of device resources forpower management, I²C communication circuit configurations, and I²C characteristics relative to device power-up sequences andinitializations. Additional discussions on decoupling are provided to support developing strategies for mitigating power-supply pushingof device frequency.

標簽： I2C 高精度實時時鐘

上傳時間： 2013-11-23

上傳用戶：WMC_geophy
校準ADC內部偏移的光學微控制器DS4830

Abstract: The DS4830 optical microcontroller's analog-to-digital converter (ADC) offset can change with temperature and gainselection. However, the DS4830 allows users to measure the ADC internal offset. The measured ADC offset is added to the ADCoffset register to nullify the offset error. This application note demonstrates the DS4830's ADC internal offset calibration in theapplication program.

標簽： 4830 ADC DS 校準

上傳時間： 2014-12-23

上傳用戶：萍水相逢
校準復用器簡化系統校準設計

Abstract: IC switches and multiplexers are proliferating, thanks to near-continual progress in lowering the supply voltage,incorporating fault-protected inputs, clamping the output voltage, and reducing the switch resistances. The latest of these advancesis the inclusion of precision resistors to allow two-point calibration of gain and offset in precision data-acquisition systems.

標簽： 校準復用器校準

上傳時間： 2013-11-12

上傳用戶：acwme
視頻差分放大器帶來低電壓應用的多功能性

The LT®6552 is a specialized dual-differencing 75MHzoperational amplifier ideal for rejecting common modenoise as a video line receiver. The input pairs are designedto operate with equal but opposite large-signal differencesand provide exceptional high frequency commonmode rejection (CMRR of 65dB at 10MHz), therebyforming an extremely versatile gain block structure thatminimizes component count in most situations. The dualinput pairs are free to take on independent common modelevels, while the two voltage differentials are summedinternally to form a net input signal.

標簽： 視頻差分放大器低電壓多功能

上傳時間： 2014-12-23

上傳用戶：13691535575
Stabilize Your Transimpedance Amplifier

Abstract: Transimpedance amplifiers (TIAs) are widely used to translate the current output of sensors like photodiode-to-voltagesignals, since several circuits and instruments can only accept voltage input. An operational amplifier with a feedback resistor fromoutput to the inverting input is the most straightforward implementation of such a TIA. However, even this simple TIA circuit requirescareful trade-offs among noise gain, offset voltage, bandwidth, and stability. Clearly stability in a TIA is essential for good, reliableperformance. This application note explains the empirical calculations for assessing stability and then shows how to fine-tune theselection of the feedback phase-compensation capacitor.

標簽： Transimpedance Stabilize Amplifier Your

上傳時間： 2013-11-13

上傳用戶：daoyue
DA轉換接口的射頻IQ調制

Linear Technology’s High Frequency Product lineupincludes a variety of RF I/Q modulators. The purpose ofthis application note is to illustrate the circuits requiredto interface these modulators with several popular D/Aconverters. Such circuits typically are required to maximizethe voltage transfer from the DAC to the baseband inputsof the modulator, as well as provide some reconstructionfi ltering.

標簽： DA轉換接口射頻調制

上傳時間： 2013-10-19

上傳用戶：FreeSky