Abstract-This paper presents a 6 Gb/s 4-channel arrayed transimpedance amplifiers (TIA) with the gain control for 4-channel passive optical network in 0.13 mm complementary metal oxide semiconductor (CMOS) technology. A regulated cascode input stage and inductive-series peaking are proposed in order to increase the bandwidth. Also, a variable gain control is implemented to provide flexibility to the overall system. The TIA has a maximum 98.1 dBΩ gain and an input current noise level of about 37.8 pA/Hz. The die area of the fabricated TIA is 1.9 mm x 2.2 mm for 4-channel. The power dissipation is 47.64 mW/1ch.

In this paper, a Relaxation Oscillator with temperature compensation using BGR and ADC is presented. The current to determine the frequency of Relaxation Oscillator can be controlled. By adjusting the current according to the temperature using the code that is output from the ADC and BGR, was to compensate the output frequency of the temperature. It is fabricated in a 0.35 μm CMOS process with an active area of 240 μm x 210 μm. Current consumption is 600 μA from a 5 V and the rate of change of the output frequency with temperature shows about ±1 %.