Injection-locked balanced oscillator

Siripon, N.; Chongcheawchamnan, M.; Ang, Kian Siong; Robertson, I.D.

doi:10.1049/el:20001299

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…The power penalty was only 0.5 dB and all the tributary channels showed nearly the same performance. The achieved transmission distance of 219 km without the fiber Raman amplifier and FEC in the 40-Gb/s field trial is competitive with the previous reports in the literature [5,6]. Figure 5 shows the eye patterns.…”

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confidence: 55%

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Subharmonic injection‐locking balanced oscillator

Cheong

Leong

Shen

2004

Micro & Optical Tech Letters

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a 40-Gb/s linear channel. The optical preamplifier includes a dispersion compensator with a dispersion compensation fiber (DCF) and a tunable dispersion compensator (TDC). The TDC gives the precise dispersion compensation and minimizes the dispersion induced power penalty. Therefore, perfect dispersion compensation is achieved in the 40-Gb/s optical link. A clock-recovery circuitry, consisting of an EX-OR block and a dielectric resonator, was used for the 40-GHz clock extraction. In order to demultiplex the 40-Gb/s signal into four channels of 10-Gb/s tributary signals, a 1:4 electrical demultiplexer was used. The demultiplexer has four sets (D0 -D3) of data and data-bar outputs, a clock, and clock-bar outputs. After demultiplexing the signal, we measured the bit-error rate at the 10-Gb/s level using an error detector. Figure 4 represents the bit-error rate characteristics for 10-Gb/s tributary signals (D0 -D3). The average receiver sensitivity at BER 10 Ϫ12 was Ϫ23.5 dBm in the back-to-back configuration (solid marks). After the 219-km transmission (open marks), the sensitivity was degraded to Ϫ23 dBm. The power penalty was only 0.5 dB and all the tributary channels showed nearly the same performance. The achieved transmission distance of 219 km without the fiber Raman amplifier and FEC in the 40-Gb/s field trial is competitive with the previous reports in the literature [5,6]. Figure 5 shows the eye patterns. EXPERIMENTAL RESULTS CONCLUSIONWe have developed a 40-Gb/s ETDM prototype and demonstrated a 219-km field trial of KT's field-installed single-mode fiber in the Daejeon area. The prototype does not adopt the fiber Raman amplifier and FEC, but uses only conventional EDFAs and precisedispersion compensation. Therefore, a practical and economical field trial of the 40-Gb/s ETDM prototype was achieved. After SMF transmission 219 im, the power penalties of 0.5 dB for four 10 Gb/s tributary channels were obtained. We have concluded that the actual fiber infrastructure in Korea is adoptable for transmission of the 40 Gb/s signal.

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confidence: 55%

“…Resonant frequency can be determined purely by the length of the transmission line. In [5], an injection-locking capability was added to the topology in [3]. The locking signal is Figure 5 Optical-eye patterns with x (10 ps/div) and y (1 mW/div): (a) back-to-back; (b) after 219 km injected at the center of the transmission line.…”

Section: Introductionmentioning

confidence: 99%

Subharmonic injection‐locking balanced oscillator

Cheong

Leong

Shen

2004

Micro & Optical Tech Letters

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“…In this paper, we apply the injectionlocking technique to a distributed oscillator in order to achieve a high-power but low-noise microwave oscillator. The use of the subharmonic injection-locking technique manifests good phasenoise signals at higher frequency by injection locking to a highly stable lower-frequency signal [3]. It was also reported by Lee and Hong that a wide locking range could be achieved for microwavefrequency synthesis and modulation by using the injection-locking technique [4].…”

Section: Introductionmentioning

confidence: 86%

“…Moreover, a cascode FET mixer has a better LO-to-RF isolation characteristic than a single-gate mixer, since LO and RF signals are injected separately into each gate. It is very practical to use a single-device cascode FET mixer in applications where a balanced mixer would otherwise be needed [2,3]. However, a cascode FET mixer is not an adequate choice for applications that require good linearity, despite its high isolation characteristics and high conversion gain [4].…”

Section: Theoretical Backgroundmentioning

confidence: 99%

5.2‐GHz subharmonic injection‐locked distributed oscillator

Yuen

Tsang

2004

Micro & Optical Tech Letters

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RF loss and cross talk on extremely high resistivity (10K-1Mcm) Si fabricated by ion implantation, IEEE MTT-S Int Microwave ABSTRACT: A novel subharmonic injection-locked distributed oscillator is proposed and presented. A 5.2-GHz distributed oscillator is locked to a 2.6-GHz injection source. The injection source is applied to the feedback path between the collector line and the base line of the distributed oscillator for optimal locking range. The circuit is designed for 2.7-V operation. The developed oscillator delivers ϩ3-dBm output power with a phase noise of Ϫ110 dBc/Hz at 500-kHz offset at 5.2 GHz. ABSTRACT: A direct-conversion mixer with zero-bias current for IMT-2000 application is designed by using the resistive cascode FET structure and is driven by the 2 nd -harmonic of the local oscillator (LO) signal. Dueto the zero-bias current operation of the cascode FET, the designed mixer has characteristics of very high-power efficiency and low-power consumption. In addition, the designed mixer not only has good linearity but also no conversion loss. When the designed mixer is driven by a 0-dBm LO signal, it has characteristics of 0.67-dB conversion gain, 4-dBm input P Ϫ1dB ,

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