A Miniaturized 70-GHz Broadband Amplifier in 0.13-$\mu {\hbox{m}}$ CMOS Technology

Abstract

A 70-GHz broadband amplifier is realized in a 0.13-m CMOS technology. By using five cascaded commonsource stages with the proposed asymmetric transformer peaking technique, the measured bandwidth and gain can reach 70.6 GHz and 10.3 dB under a power consumption ( DC ) of 79.5 mW. Within the circuit bandwidth, the maximum input and output reflection coefficients are 6.1 and 10.8 dB, respectively. The group delay variation is 12.0 ps, and the output 1-dB compression point is 0.2 dBm at 5 GHz. With the miniaturized transformer design, the occupied core area of the circuit is only 0.05 mm 2 . This amplifier demonstrates a gain-bandwidth product of 231 GHz and a GBW DC up to 2.9 GHz/mW. Index Terms-Broadband amplifier, CMOS, common-source (CS) stage, gain-bandwidth product (GBW), transformer peaking.

An integrated CMOS–silicon photonics transmitter with a 112 gigabaud transmission and picojoule per bit energy efficiency

“…Performance enhancement techniques and design philosophies that have matured for electrical amplifiers could, therefore, be utilized to develop silicon MZMs. Following this concept, an initial attempt 31 was to adopt an inductive network (T-coil peaking) 32 within the silicon MZM and driver amplifier interface (Fig. 1b, right).…”

112G baud sub pJ/bit integrated CMOS-silicon photonics transmitter

“…Performance enhancement techniques and design philosophies that have matured for electrical ampli ers could therefore be utilized to develop silicon MZM. Following this concept, an initial attempt 26 was to adopt an inductive network (T-coil peaking) 27 within the silicon MZM and driver ampli er interface as shown in the right of Fig. 1(b).…”

Electronic–photonic convergence for silicon photonics transmitters beyond 100 Gbps on–off keying

“…However, "T-coil" peaking provides an alternative means of increasing the bandwidth. Previous work [9] has demonstrated that an asymmetrical transformer can provide an additional 70% bandwidth enhancement over that provided by inductive peaking techniques when utilized in broadband amplifier designs. Therefore, an intuitive assumption is that an asymmetrical transformer may also find its utilization within the optical modulator driver design, where the concerns around bandwidth limitations could be alleviated to a large extent.…”