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Design Technique for Regulated Cascode Transimpedance Amplifier Using Gm/ID Methodology

Research Authors
Motaz M Elbadry, Mostafa Y Makkey, Mohamed Abdelgawad, Mohamed Atef
Research Department
Research Year
2020
Research Journal
Microelectronics Journal
Research Publisher
NULL
Research Vol
Vol. 95
Research Rank
1
Research_Pages
pp. 104676
Research Website
NULL
Research Abstract

This paper presents an approach using gm/ID methodology for the design of the regulated cascode circuit (RGC) transimpedance amplifier (TIA) for optical receivers. The framework uses lookup tables produced using the gm/ID methodology to define the sizing of the transistors needed to reach the required specifications. The framework has the advantage of setting limits on the design space using intuitive equations derived from the circuit analyses. This gives insight into the effect of changing the value of different circuit parameters on the resulting design while decreasing the time to reach the desired design. The framework gives the flexibility to minimize the DC power consumption or the total input referred noise. The framework is implemented in a 130 nm CMOS process with a 1.5 V supply voltage producing two different designs. Both designs met the required specifications while optimizing power consumption