特點(diǎn)（FEATURES） 精確度0.1%滿刻度（Accuracy 0.1%F.S.） 多種輸入輸出選擇（Wide selection of input/output range） 輸入與輸出1/輸出2絕緣耐壓 2仟伏特/1分鐘（Dielectric strength 2KVac/1min.（input/output1/output2）） 寬范圍交直流兩用電源設(shè)計(jì)（Wide input range for auxiliary power） 尺寸小，穩(wěn)定性高（Dimension small & High stability）
特點(diǎn)（FEATURES） 精確度0.03%滿刻度（Accuracy 0.03%F.S.） 頻率輸入范圍0.01Hz至80KHz（Input range from 0.01 Hz to 80KHz） 16 BIT 隔離類比輸出（16 bit DAC isolating analog output） 輸入與輸出1/輸出2絕緣耐壓 2仟伏特/1分鐘（Dielectric strength 2KVac/1min.（input/output1/output2）） 寬范圍交直流兩用電源設(shè)計(jì)（Wide input range for auxiliary power） 尺寸小，穩(wěn)定性高（Dimension small & High stability）
特點(diǎn)(FEATURES) 精確度0.1%滿刻度 (Accuracy 0.1%F.S.) 可作各式數(shù)學(xué)演算式功能如:A+B/A-B/AxB/A/B/A&B(Hi or Lo)/|A| (Math functioA+B/A-B/AxB/A/B/A&B(Hi&Lo)/|A|/etc.....) 16 BIT 類比輸出功能(16 bit DAC isolating analog output function) 輸入/輸出1/輸出2絕緣耐壓2仟伏特/1分鐘(Dielectric strength 2KVac/1min. (input/output1/output2/power)) 寬范圍交直流兩用電源設(shè)計(jì)(Wide input range for auxiliary power) 尺寸小,穩(wěn)定性高(Dimension small and High stability)
Avalanche photo diode (APD) receiver modules arewidely used in fi ber optic communication systems. AnAPD module contains the APD and a signal conditioningamplifi er, but is not completely self contained. It stillrequires signifi cant support circuitry including a highvoltage, low noise power supply and a precision currentmonitor to indicate the signal strength. The challenge issqueezing this support circuitry into applications withlimited board space. The LT®3482 addresses this challengeby integrating a monolithic DC/DC step-up converter andan accurate current monitor. The LT3482 can supportup to a 90V APD bias voltage, and the current monitorprovides better than 10% accuracy over four decades ofdynamic range (250nA to 2.5mA).
提出了一種基于PIC16F877A微控制器和CC2500射頻收發(fā)器芯片的低功耗、低成本RFID（Radio Frequency Identification， 無(wú)線射頻識(shí)別）局域定位系統(tǒng)設(shè)計(jì)方法，介紹了系統(tǒng)的定位工作原理、主要硬件電路模塊及定位算法的設(shè)計(jì)和實(shí)現(xiàn)。采用基于序列號(hào)對(duì)時(shí)隙數(shù)運(yùn)算的排序算法有效解決了多標(biāo)簽識(shí)別碰撞的問(wèn)題，基于射頻輻射強(qiáng)度（Received Signal strength Indication， RSSI）和圓周定位算法實(shí)現(xiàn)了基于RFID多標(biāo)簽系統(tǒng)的平面定位。實(shí)驗(yàn)測(cè)試表明，這種射頻定位方法能夠?qū)崿F(xiàn)一定精度下的無(wú)線局域定位的功能。
American Gladiator,You are consulting for a game show in which n contestants are pitted against n gladiators in order to see which contestants are the best. The game show aims to rank the contestants in order of strength this is done via a series of 1-on-1 matches between contestants and gladiators. If the contestant is stronger than the gladiator, then the contestant wins the match otherwise, the gladiator wins the match. If the contestant and gladiator have equal strength, then they are “perfect equals” and a tie is declared. We assume that each contestant is the perfect equal of exactly one gladiator, and each gladiator is the perfect equal of exactly one contestant. However, as the gladiators sometimes change from one show to another, we do not know the ordering of strength among the gladiators.
This standard describes a keyed-hash message authentication code (HMAC), a
mechanism for message authentication using cryptographic hash functions. HMAC can
be used with any iterative Approved cryptographic hash function, in combination with a
shared secret key. The cryptographic strength of HMAC depends on the properties of the
underlying hash function. The HMAC specification in this standard is a generalization of
Internet RFC 2104, HMAC, Keyed-Hashing for Message Authentication, and ANSI
X9.71, Keyed Hash Message Authentication Code.
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