| This paper is basically explaining a MCML, MOS Current Mode Logic, pulse generator and a impulse shaping circuit, which can be applicable to a recent ultra-wide bandwidth (UWB) communication system and operate in frequency range about 1GHz∼2GHz for non-communication systems and over 3.1GHz for UWB wireless communication systems. Again, this pulse generating block is consisted of a delay line which is series of interpolation delay units, and one XOR unit which is the famous Gilbert differential cell. The simulation has a purpose of around 300ps propagation delay time and over 3.1GHz of actual operation. Then, the final desired output, impulse shape, is generated by passing through a Band-Pass-Filter (BPF). On this paper, for the simulation, the impulse signal was shaped from the output digital pulse after the pulse generator with through RLC passive BPF instead of an integrated circuit, but finally, for actual IC fabrication, the MEMS technology will be applied for the RLC passive BPF implementation by some other members.; The circuitry designed and simulated with TSMC 0.18μ CMOS technology because the CMOS technology is very easy to be fabricated, lower power consumable, and lower fabricating cost. Moreover, the CML topology is applied for performing a faster operating output and lower power consumption in this case. (Abstract shortened by UMI.)... |
