22.3 A 4-to-11GHz injection-locked quarter-rate clocking for an adaptive 153fJ/b optical receiver in 28nm FDSOI CMOS

Raj, Mayank; Saeedi, Saeed; Emami, Azita

doi:10.1109/isscc.2015.7063097

Cited by 18 publications

(5 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Typically, such links with more complex modulation formats are designed to increase the data capacity of lines, not to reduce energy per bit communicated. Additionally, such links often require clocking to establish the necessary timing for signals, and clock recovery circuitry can consume significant power (e.g., 50% of the total receiver power in a recent example [43]). Even on chips themselves, the power to run the clocking inside logic blocks can also be comparable to other power dissipations [44].…”

Section: ) Energies For Electrical Off-chip Communicationsmentioning

confidence: 99%

“…So, even if we consider a noise-limited approach, to reduce power dissipation overall, it can be useful to reduce the total input capacitance connected to the transistor, including the detector capacitance. (See also [19] for a recent analysis of noise in optical interconnect receiver circuits 43 . )…”

Section: A Receiver Circuit Energiesmentioning

confidence: 99%

“…4.65 of [110] and associated text. 43 See, for example, the terms proportional to the photodetector capacitance and inversely proportional to the square root of the transimpedance amplifier power dissipation in determining the minimum possible received optical power This receiverless approach can be a good starting point for considering designs and energy savings from low photodetector capacitance. The resulting electrical input circuits can be extremely simple, being just CMOS gates, for example.…”

Section: B Low-capacitance Front Ends and Receiverless Operationmentioning

confidence: 99%

“…See Eq. 4.65 of[110] and associated text 43. See, for example, the terms proportional to the photodetector capacitance and inversely proportional to the square root of the transimpedance amplifier power dissipation in determining the minimum possible received optical power…”

mentioning

confidence: 99%

See 3 more Smart Citations

Attojoule Optoelectronics for Low-Energy Information Processing and Communications

Miller

2017

J. Lightwave Technol.

570

406

View full text Add to dashboard Cite

Optics offers unique opportunities for reducing energy in information processing and communications while simultaneously resolving the problem of interconnect bandwidth density inside machines. Such energy dissipation overall is now at environmentally significant levels; the source of that dissipation is progressively shifting from logic operations to interconnect energies. Without the prospect of substantial reduction in energy per bit communicated, we cannot continue the exponential growth of our use of information. The physics of optics and optoelectronics fundamentally addresses both interconnect energy and bandwidth density, and optics may be the only scalable solution to such problems. Here we summarize the corresponding background, status, opportunities, and research directions for optoelectronic technology and novel optics, including sub-femtojoule devices in waveguide and novel 2D array optical systems. We compare different approaches to low-energy optoelectronic output devices and their scaling, including lasers, modulators and LEDs, optical confinement approaches (such as resonators) to enhance effects, and the benefits of different material choices, including 2D materials and other quantum-confined structures. With such optoelectronic energy reductions, and the elimination of line charging dissipation by the use optical connections, the next major interconnect dissipations are in the electronic circuits for receiver amplifiers, timing recovery and multiplexing. We show we can address these through the integration of photodetectors to reduce or eliminate receiver circuit energies, free-space optics to eliminate the need for timing and multiplexing circuits (while also solving bandwidth density problems), and using optics generally to save power by running large synchronous systems. One target concept is interconnects from ~ 1 cm to ~ 10 m that have the same energy (~ 10fJ/bit) and simplicity as local electrical wires on chip.

show abstract

Section: ) Energies For Electrical Off-chip Communicationsmentioning

confidence: 99%

Section: A Receiver Circuit Energiesmentioning

confidence: 99%

Section: B Low-capacitance Front Ends and Receiverless Operationmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Attojoule Optoelectronics for Low-Energy Information Processing and Communications

Miller

2017

J. Lightwave Technol.

570

406

View full text Add to dashboard Cite

show abstract

“…8 shows the energy savings for the considered codes, with transmitter laser and driver, receiver energy and FEC circuits taken into account. The receiver energy was estimated based on a recent publication [23], and assumed to be inversely proportional to the code rate. As shown, the receiver energy increases slightly with the introduced error correction, since the effective information rate reduces due to the coding overhead.…”

Section: Resultsmentioning

confidence: 99%

Low-Power Low-Latency BCH Decoders for Energy-Efficient Optical Interconnects

Fougstedt

Szczerba

Larsson-Edefors

2017

J. Lightwave Technol.

View full text Add to dashboard Cite

Since energy dissipation and latency in optical interconnects are of utmost concern, such links are often operated without forward error correction. We propose a low-complexity noniterative two-error correcting Bose-Chaudhuri-Hocquenghem (BCH) decoder circuit that significantly relaxes the stringent optical modulation amplitude requirements on the transmitter, which help to reduce laser and laser driver energy dissipation. We demonstrate, in a 28-nm CMOS process technology, that the introduction of this BCH circuit in an uncoded link leads to energy-per-bit reductions of 25%, even when the impact of code rate on receiver energy dissipation is considered.

show abstract

OEICs for High-Speed Data Links and Tympanic Membrane Transducer of Hearing Aid Device

Chen

Huang

Jian

2017

Smart Sensors at the IoT Frontier

View full text Add to dashboard Cite

22.3 A 4-to-11GHz injection-locked quarter-rate clocking for an adaptive 153fJ/b optical receiver in 28nm FDSOI CMOS

Cited by 18 publications

References 4 publications

Attojoule Optoelectronics for Low-Energy Information Processing and Communications

Attojoule Optoelectronics for Low-Energy Information Processing and Communications

Low-Power Low-Latency BCH Decoders for Energy-Efficient Optical Interconnects

OEICs for High-Speed Data Links and Tympanic Membrane Transducer of Hearing Aid Device

Contact Info

Product

Resources

About