BGA布線指南 BGA CHIP PLACEMENT AND ROUTING RULE BGA是PCB上常用的組件，通常CPU、NORTH BRIDGE、SOUTH BRIDGE、AGP CHIP、CARD BUS CHIP…等，大多是以bga的型式包裝，簡言之，80﹪的高頻信號(hào)及特殊信號(hào)將會(huì)由這類型的package內(nèi)拉出。因此，如何處理BGA package的走線，對重要信號(hào)會(huì)有很大的影響。 通常環(huán)繞在BGA附近的小零件，依重要性為優(yōu)先級(jí)可分為幾類： 1. by pass。 2. clock終端RC電路。 3. damping（以串接電阻、排組型式出現(xiàn)；例如memory BUS信號(hào)） 4. EMI RC電路（以dampin、C、pull height型式出現(xiàn)；例如USB信號(hào)）。 5. 其它特殊電路（依不同的CHIP所加的特殊電路；例如CPU的感溫電路）。 6. 40mil以下小電源電路組（以C、L、R等型式出現(xiàn)；此種電路常出現(xiàn)在AGP CHIP or含AGP功能之CHIP附近，透過R、L分隔出不同的電源組）。 7. pull low R、C。 8. 一般小電路組（以R、C、Q、U等型式出現(xiàn)；無走線要求）。 9. pull height R、RP。 中文DOC，共5頁，圖文并茂
上傳時(shí)間： 2013-04-24
上傳用戶：cxy9698
MPC755 and MPC745 PowerPC microprocessors are high-performance, low-power, 32-bit implementations of
上傳時(shí)間： 2013-05-27
上傳用戶：330402686
用fpga實(shí)現(xiàn)的DA轉(zhuǎn)換器，有說明和源碼，VDHL文件。\\r\\nA PLD Based Delta-Sigma DAC\\r\\nDelta-Sigma modulation is the simple, yet powerful,\\r\\ntechnique responsible for the extraordinary\\r\\nperformance and low cost of today s audio CD\\r\\nplayers. The simplest Delta-Sigm
標(biāo)簽： fpga DA轉(zhuǎn)換器
上傳時(shí)間： 2013-08-22
上傳用戶：dudu1210004
Abstract: This application note describes a new generation of digital-input Class D audio amplifiers that achieve high PSRRperformance, comparable to traditional analog Class D amplifiers. More importantly, these digital-input Class D amplifiersprovide additional benefits of reduced power, complexity, noise, and system cost.
標(biāo)簽： 數(shù)字輸入放大器 系統(tǒng)設(shè)計(jì)
上傳時(shí)間： 2013-12-20
上傳用戶：JIUSHICHEN
Abstract: This application note describes how sampling clock jitter (time interval error or "TIE jitter") affectsthe performance of delta-sigma digital-to-analog converters (DACs). New insights explain the importanceof separately specifying low-frequency (< 2x passband frequency) and high-frequency or wideband (> 2xpassband frequency) jitter tolerance in these devices. The article also provides an application example ofa simple highly jittered cycle-skipped sampling clock and describes a method for generating a properbroadband jittered clock. The document then goes on to compare Maxim's audio DAC jitter tolerance tocompetitor audio DACs. Maxim's exceptionally high jitter tolerance allows very simple and low-cost sampleclock implementations.
標(biāo)簽： DAC 音頻 數(shù)模轉(zhuǎn)換器 抖動(dòng)
上傳時(shí)間： 2013-10-25
上傳用戶：banyou
The MAX5713/MAX5714/MAX5715 4-channel, low-power,8-/10-/12-bit, voltage-output digital-to-analog converters(DACs) include output buffers and an internal referencethat is selectable to be 2.048V, 2.500V, or 4.096V. TheMAX5713/MAX5714/MAX5715 accept a wide supplyvoltage range of 2.7V to 5.5V with extremely low power(3mW) consumption to accommodate most low-voltageapplications. A precision external reference input allowsrail-to-rail operation and presents a 100kI (typ) load toan external reference.
標(biāo)簽： MAX 5713 5715 數(shù)據(jù)資料
上傳時(shí)間： 2013-12-23
上傳用戶：ArmKing88
The MAX4968/MAX4968A are 16-channel, high-linearity,high-voltage, bidirectional SPST analog switches with18I (typ) on-resistance. The devices are ideal for use inapplications requiring high-voltage switching controlledby a low-voltage control signal, such as ultrasound imagingand printers. The MAX4968A provides integrated40kI (typ) bleed resistors on each switch terminal todischarge capacitive loads. Using HVCMOS technology,these switches combine high-voltage bilateral MOSswitches and low-power CMOS logic to provide efficientcontrol of high-voltage analog signals.
標(biāo)簽： 4968 MAX 數(shù)據(jù)手冊
上傳時(shí)間： 2013-10-09
上傳用戶：yepeng139
Abstract: Class D amplifiers are typically very efficient, making them ideal candidates for portable applications that require longbattery life and low thermal dissipation. However, electromagnetic interference (EMI) is an issue that commonly accompanies theClass D switching topology. Active-emissions limiting reduces radiated emissions and enables "filterless" operation, allowingdesigners to create small, efficient portable applications with low EMI.
標(biāo)簽： EMI D類放大器 保持 便攜式產(chǎn)品
上傳時(shí)間： 2013-11-23
上傳用戶：哈哈hah
Abstract: Build a composite amplifier featuring high gain, wide bandwidth, good DC accuracy and low distortion
標(biāo)簽： 視頻放大器 增益帶寬 運(yùn)算放大器
上傳時(shí)間： 2014-12-23
上傳用戶：JasonC
Photodiodes can be broken into two categories: largearea photodiodes with their attendant high capacitance(30pF to 3000pF) and smaller area photodiodes withrelatively low capacitance (10pF or less). For optimalsignal-to-noise performance, a transimpedance amplifi erconsisting of an inverting op amp and a feedback resistoris most commonly used to convert the photodiode currentinto voltage. In low noise amplifi er design, large areaphotodiode amplifi ers require more attention to reducingop amp input voltage noise, while small area photodiodeamplifi ers require more attention to reducing op amp inputcurrent noise and parasitic capacitances.
上傳時(shí)間： 2013-10-28
上傳用戶：hanbeidang
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