| 1. | This reduces gain but widens the amplifier's passband .
这方法降低了增益，但加宽了放大器的通频带。 |
| 2. | There is always a smooth transition between passband and stopband
通频带和抑止频带之间总是存在一个“平滑切换点” 。 |
| 3. | The specification is that the cutoff frequency must be more than 15mhz , the maximum passband ripple must be 0 . 2db and the minimum stopband attenuation must be 40db
该滤波器要求截止频率大于15mhz ，通带最大纹波为0 . 2db ，阻带最小衰减为40db 。 |
| 4. | The millimeter wave diplexers used in the ka - band satellite communications are investigated . these diplexers are of high working frequency , narrow passband and high selectivity , which demands the channel filters good performance
所研究的毫米波双工器工作频率高(接近40ghz ) ，收发通道带宽窄、接收频率和发射频率间隔很小。 |
| 5. | In the future it may be possible to have such bandpass sigma - delta adcs with userprogrammable digital filter coefficients , so that the passband of a receiver could be modified during operation in response to the characteristics of the signal ( and the interference
未来可能会出现用户可编程数字滤波系数的带通- adc ，这样接收机的通频带就可以随着所接收的信号的特性而改变。 |
| 6. | Thirdly , two kinds of the methods to improve the performance of filter stopband has been discussed . these methods are used to cleared up the influence of the parasitical passband . through the simulation and test result shows that these methods " s performance is expected
第三,论了2种对滤波器阻带抑制进行改善的方法,以消除寄生通带的影响,通过仿真和实际制作滤波器的测试结果。 |
| 7. | And it turns out that the bit error rate of passband equalizer is smaller than that of baseband equalizer , but the convergent stability of baseband equalizer is better than that of passband equalizer . at the same time , baseband equalizer can be implemented in hardware more easily than passband equalizer
通带均衡系统的误码率总是小于基带均衡系统的误码率;但基带均衡器收敛后的稳定性要比通带均衡器好,且基带均衡器的采样频率较低,易于硬件实现。 |
| 8. | The sampling technology is also being explored which including lowpass sampling , quadrature sampling and direct passband sampling and the setting of a / d , sampling rate , data acquisition and selecting filtering parameters . the implementation of each technique is also being discussed
分别对低通采样、正交带通采样和直接带通采样技术中有关a d在系统中的位置、采样率的确定、信息获取和滤波参数选取等问题进行系统论述，并讨论了各自的技术实现问题。 |
| 9. | The main works are as follows : 1 . the paper systematically describes basic concepts and theories that form the foundation for design of general microwave filters . the topics will cover filter transfer function , lowpass prototype filters , frequency transformations , immittance inverters and the passband insertion loss under the influence of the dissipation of filter elements 2
现总结如下: 1 .对微波滤波器的设计理论进行系统的分析,阐述了微波滤波器的传输函数、低通原型、频率变换、倒置变换器以及元件损耗对带内插损的影响等方面。 |
| 10. | A method of pitch mark determination for a speech , includes : acquiring a fundamental frequency point and fundamental frequency passband signals by using an adaptable filter ; detecting a number of passing zero positions of the fundamental frequency passband signals ; and generating at least a set of pitch marks from a number of passing zero positions
一种决定语音音高标记的方法，系藉以找出一语音之一组音高标记，此决定语音音高标记的方法系利用一可适性滤波器取得一基频点与一基频带通讯号；求取基频带通讯号之复数个过零点位置；然后经由复数个过零点位置产生至少一组音高标记。 |
