现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2013年
6期
161-163
,共3页
ARM%DDS%peak detection%current pump
调频电流源是一种频率可以改变的电流源,ARM 控制 DDS 输出一个频率以及幅度可调的正弦电压信号,DDS输出信号再经过滤波以及 V/I 转换得到一个正弦电流信号,其电流幅度输出范围为0~20 mA,频率范围为0~1 MHz.详细讲述了该调频电流源实现的重要技术以及相应的公式推导.对所设计的调频电流源电路的性能进行了仿真,仿真结果表明,其输出频率0~1 MHz、幅度0~20 mA 内可调,符合设计的要求.该电路精度高,稳定性好.
調頻電流源是一種頻率可以改變的電流源,ARM 控製 DDS 輸齣一箇頻率以及幅度可調的正絃電壓信號,DDS輸齣信號再經過濾波以及 V/I 轉換得到一箇正絃電流信號,其電流幅度輸齣範圍為0~20 mA,頻率範圍為0~1 MHz.詳細講述瞭該調頻電流源實現的重要技術以及相應的公式推導.對所設計的調頻電流源電路的性能進行瞭倣真,倣真結果錶明,其輸齣頻率0~1 MHz、幅度0~20 mA 內可調,符閤設計的要求.該電路精度高,穩定性好.
조빈전류원시일충빈솔가이개변적전류원,ARM 공제 DDS 수출일개빈솔이급폭도가조적정현전압신호,DDS수출신호재경과려파이급 V/I 전환득도일개정현전류신호,기전류폭도수출범위위0~20 mA,빈솔범위위0~1 MHz.상세강술료해조빈전류원실현적중요기술이급상응적공식추도.대소설계적조빈전류원전로적성능진행료방진,방진결과표명,기수출빈솔0~1 MHz、폭도0~20 mA 내가조,부합설계적요구.해전로정도고,은정성호.
Frequency modulation current source is a kind of current source which can change frequency. DDS is controlled by ARM to output a sine voltage signal whose frequency and amplitude are adjustable. A sinusoidal current signal is obtained af?ter filtering and V/I conversion of DDS output signal. Its amplitude range is 0~20 mA and frequency range is 0~1 MHZ. The im?portant technology of realizing the frequency modulation current source and the corresponding formula derivation are elaborated. The designed frequency modulation current source circuit was simulated. The simulation results show that its output frequency is 0~1 MHz and amplitude is 0~20 mA adjustable. It is coincident with the design requirements. The circuit accuracy is high and its stability is expected.
