Data Transmission with Gbits Speed Using Cmos Based Integrated Circuits for Opto-electronic Interfaces and Applications

The performance of the data transmission using the principle of the optical communication can be enhanced further simply by increasing both the wavelength count and bit rate per channel, so as to improve the utilization of the optical fiber bandwidth. This approach in turn requires the most suitable device structures and the technologies for both opto-electronic transducers and the associated driving electronics circuitry. The number of transistor stages required between the power and ground rails is only two so that the minimum supply voltage required is one threshold voltage plus one pinch-off voltage. The pre-amplifier is a balanced two-stage configuration such that the effect of bias-dependent mismatches is minimized. A new inductive series-peaking technique has been introduced so as to enhance the bandwidth by utilizing the resonance characteristics of LC networks. In addition to this arrangement, a new negative differential current feedback technique has been put forward for the discussion so as to boost the bandwidth of the system and to reduce the value of peaking inductors. This pre-amplifier circuit has been implemented in TSMC 0.18 μm, 1.8 V, 6-metal mixed mode CMOS technology and is analyzed using Spectre from Cadence Design Systems with BSIM3v3 device models. For an optical front-end with a 0.3 pF photodiode capacitance, simulation results demonstrate that the pre-amplifier has bandwidth of 3.5 GHz and provides a trans-impedance gain of 66 dB. The total chip area is approximately 1 mm 2 and the DC power consumption is about 85 mW INTERNATIONAL JOURNAL OF COMPUTER ENGINEERING & TECHNOLOGY (IJCET) ISSN 0976 – 6367(Print) ISSN 0976 – 6375(Online) Volume 4, Issue 3, May-June (2013), pp. 188-203 © IAEME: www.iaeme.com/ijcet.asp Journal Impact Factor (2013): 6.1302 (Calculated by GISI) www.jifactor.com IJCET