Injection locking

About: Injection locking is a research topic. Over the lifetime, 4567 publications have been published within this topic receiving 60942 citations.

A 20-Gb/s Burst-Mode Clock and Data Recovery Circuit Using Injection-Locking Technique

Abstract: A 20-Gb/s clock and data recovery circuit incorporates injection-locking technique to achieve high-speed operation with low power dissipation. The circuit creates spectral line at the frequency of data rate and injection-locks two cascaded LC oscillators. A frequency-monitoring mechanism is employed to ensure a close matching between the VCO natural frequency and data rate. Fabricated in 90-nm CMOS technology, this circuit achieves a bit error rate of less than 10-9 in both continuous (PRBS of 231-1) and burst modes while consuming 175 mW from a 1.5-V supply.

A 0.6 mW/Gb/s, 6.4–7.2 Gb/s Serial Link Receiver Using Local Injection-Locked Ring Oscillators in 90 nm CMOS

Abstract: This paper describes a quad-lane, 6.4-7.2 Gb/s serial link receiver prototype using a forwarded clock architecture. A novel phase deskew scheme using injection-locked ring oscillators (ILRO) is proposed that achieves greater than one UI of phase shift for multiple clock phases, eliminating phase rotation and interpolation required in conventional architectures. Each receiver, optimized for power efficiency, consists of a low-power linear equalizer, four offset-cancelled quantizers for 1:4 demultiplexing, and an injection-locked ring oscillator coupled to a low-voltage swing, global clock distribution. Measurement results show a 6.4-7.2 Gb/s data rate with BER < 10-12 across 14 cm of PCB, and also an 8.0 Gb/s data rate through 4 cm of PCB. Designed in a 1.2 V, 90 nm CMOS process, the ILRO achieves a wide tuning range from 1.6-2.6 GHz. The total area of each receiver is 0.0174 mm2, resulting in a measured power efficiency of 0.6 mW/Gb/s.

Large-signal analysis of all-optical wavelength conversion using two-mode injection-locking in semiconductor lasers

Abstract: A large-signal analysis is presented for a DC-biased Fabry-Perot laser locked by simultaneous strong optical injection of a CW signal and a modulated signal into different modes. The model is based on the description of injection-locking by Lang (1982) which is shown to hold even under the condition of strong injection and large detuning of the input signals. The following results are obtained: the configuration allows all-optical wavelength conversion in the multigigabit range, and both logically noninverting and inverting conversion is possible. In both operation modes, the conversion mechanism is mainly attributed to dispersive switching which is shown to be very fast above threshold due to injection-locking. Operation up to data rates of 20 Gb/s is possible with reasonable output extinction ratio. The bandwidth is determined by the relaxation oscillation frequency of the laser. It will be extended by decreasing the resonator length, increasing the injected current, and increasing the injected optical power. The output signal is nearly chirp-free. The model is able to explain the main results of previously published experiments.

Analysis of oscillators with external feedback loop for improved locking range and noise reduction

Abstract: A simple scheme for enhancing the locking/capture range and phase-noise performance of FET-based voltage-controlled oscillators (VCO's) is presented using a low-pass feedback loop from the oscillator output to the varactor tuning port. The nonlinearity of the FET provides for mixer or phase detector behavior (a self-oscillating mixer). The resulting feedback oscillator advantageously combines the principles of a conventional injection-locked oscillator (ILO) and phase-locked loop (PLL), which we refer to as an injection-locked phase-locked loop (ILPLL). The analysis suggests that the ILPLL can be designed for superior near-carrier phase-noise performance compared with conventional ILO or PLL circuits. A 10-GHz prototype was fabricated, which demonstrated a locking range more than double that of the isolated VCO injection-locking range over the same range of injected signal power.