传输速率为100 kbps的单极性RZ信号,其第一零点带宽为( )。 A: 50 kHz B: 100 kHz C: 150 kHz D: 200 kHz
传输速率为100 kbps的单极性RZ信号,其第一零点带宽为( )。 A: 50 kHz B: 100 kHz C: 150 kHz D: 200 kHz
已知某放大电路电压增益的频率特性表达式为:(式中f的单位为Hz) A: 100 kHz B: 200 kHz C: 50 kHz D: 10 kHz
已知某放大电路电压增益的频率特性表达式为:(式中f的单位为Hz) A: 100 kHz B: 200 kHz C: 50 kHz D: 10 kHz
如图所示的触发器,若输入CP脉冲的频率为100kHz,则输出Q的频率为( )。[img=216x113]18035fcfbd0f0c7.png[/img] A: 50 kHz B: 100 kHz C: 150 kHz D: 200 kHz E: 25 kHz F: 125 kHz
如图所示的触发器,若输入CP脉冲的频率为100kHz,则输出Q的频率为( )。[img=216x113]18035fcfbd0f0c7.png[/img] A: 50 kHz B: 100 kHz C: 150 kHz D: 200 kHz E: 25 kHz F: 125 kHz
采用矩形NRZ脉冲传输的QPSK信号,若传输速率为100 kbps,则该信号所需的传输带宽为( )。 A: 25 kHz B: 50 kHz C: 100 kHz D: 200 kHz
采用矩形NRZ脉冲传输的QPSK信号,若传输速率为100 kbps,则该信号所需的传输带宽为( )。 A: 25 kHz B: 50 kHz C: 100 kHz D: 200 kHz
某LC振荡电路的振荡频率为100kHz,如将LC选频网络中的电容增大一倍,则振荡频率约为( )。 (a) 200 kHz (b) 140 kHz (c) 70 kHz (d) 50 kHz
某LC振荡电路的振荡频率为100kHz,如将LC选频网络中的电容增大一倍,则振荡频率约为( )。 (a) 200 kHz (b) 140 kHz (c) 70 kHz (d) 50 kHz
声音作为一种波,频率在( )之间的声音是可以被人耳识别的。 A: 20 Hz~20 kHz B: 2 Hz~20Hz C: 20 kHz~200 kHz D: 200 kHz~400 kHz
声音作为一种波,频率在( )之间的声音是可以被人耳识别的。 A: 20 Hz~20 kHz B: 2 Hz~20Hz C: 20 kHz~200 kHz D: 200 kHz~400 kHz
RC选频振荡电路适合( )KHz一下的低频电路。 A: 1000 B: 200 C: 100 D: 50
RC选频振荡电路适合( )KHz一下的低频电路。 A: 1000 B: 200 C: 100 D: 50
一路模拟话音的典型带宽是( )。 A: 50 Hz B: 800 Hz C: 4000 Hz D: 200 kHz
一路模拟话音的典型带宽是( )。 A: 50 Hz B: 800 Hz C: 4000 Hz D: 200 kHz
There are eight analog signals, each of bandwidth W=2(kHz). Samples of these signals are time-division-multiplexed, quantized and binary-coded. The step size Δ of the quantizer cannot be greater than 0.5% of the peak amplitude mp. The sampling rates (kHz) is 50% above the Nyquist rate and the minimum number of quantization levels should be . A: 6, 100 B: 12, 200 C: 24, 200 D: 48, 400
There are eight analog signals, each of bandwidth W=2(kHz). Samples of these signals are time-division-multiplexed, quantized and binary-coded. The step size Δ of the quantizer cannot be greater than 0.5% of the peak amplitude mp. The sampling rates (kHz) is 50% above the Nyquist rate and the minimum number of quantization levels should be . A: 6, 100 B: 12, 200 C: 24, 200 D: 48, 400
There are eight analog signals, each of bandwidth W=2(kHz). Samples of these signals are time-division-multiplexed, quantized and binary-coded. The step size Δ of the quantizer cannot be greater than 0.5% of the peak amplitude mp. The sampling rates (kHz) is 50% above the Nyquist rate and the minimum number of quantization levels should be . A: 6, 100 B: 12, 200 C: 24, 200 D: 48, 400
There are eight analog signals, each of bandwidth W=2(kHz). Samples of these signals are time-division-multiplexed, quantized and binary-coded. The step size Δ of the quantizer cannot be greater than 0.5% of the peak amplitude mp. The sampling rates (kHz) is 50% above the Nyquist rate and the minimum number of quantization levels should be . A: 6, 100 B: 12, 200 C: 24, 200 D: 48, 400