Novel decade electronically tunable microwave oscillator based on the distrubuted amplifier

Skvor, Z.; Saunders, S.R.; Aitchison, C.S.

doi:10.1049/el:19921048

Cited by 38 publications

(32 citation statements)

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“…Distributed amplifier is very broadband in nature. A way of converting a distributed amplifier into a distributed oscillator has been proposed by professor Aitchitson [1]. A distributed oscillator was predicted to be instantly tuneable by differentially biasing one pair of active devices at a time.…”

Section: Motivationmentioning

confidence: 99%

“…The reverse mode signal is distorted by anti-phase interferences and loaded by a resistor in idle drain line load. Reverse gain loopback: [1] brought the idea of omitting the drain line resistor while connecting the former idle drain output directly to the distributed amplifier input. This approach makes use of the socalled reverse gain to form an oscillation loop.…”

Section: Distributed Amplifiermentioning

confidence: 99%

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The distributed oscillator at 4 GHz

Divina

Skvor

1998

IEEE Trans. Microwave Theory Techn.

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Section: Motivationmentioning

confidence: 99%

Section: Distributed Amplifiermentioning

confidence: 99%

The distributed oscillator at 4 GHz

Divina

Skvor

1998

IEEE Trans. Microwave Theory Techn.

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“…A DVCO is based on a Distributed Amplifier (DA) operating in the reverse gain mode [9][10][11][12], or in the forward gain mode [13][14][15][16][17][18][19][20]. DVCOs are also known as travelling wave VCOs which belong to the class of wave-based oscillators wherein there are the rotary-travelling wave VCOs (also called closed-loop Distributed VCOs) and standing-wave VCOs [21].…”

Section: Introductionmentioning

confidence: 99%

Analysis and design of wideband distributed VCOs based on switched-cells tuning technique

Cannone

Avitabile

2015

Analog Integr Circ Sig Process

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The paper discusses a VCO belonging to the class of Distributed-VCOs (DVCOs) designed for wide tuning range operations. The trade-off between wide bandwidth and phase noise is central to the proposed design and the paper covers the DVCO topology and discusses its operations in detail, starting by the general conditions of oscillation and covering the applied tuning techniques. In particular the paper reports a description of the so called ''switched-cells tuning technique''. The design of a fully integrated DVCO is reported. It is based on the ''switched-cells tuning technique'' and provides the following measured tuning ranges over four sub-bands: 219 MHz around 900, 291 MHz around 1.5 GHz, 392 MHz around 1.8 GHz and 199 MHz around 2.4 GHz. The DVCO performances are discussed and compared with other similar implementation reported in the recent literature showing the potentialities of the proposed approach. According to the reported theory, the results show the applicability of the proposed Distributed VCOs for wide bandwidth applications.

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“…Essentially a distributed oscillator consists of a distributed amplifier (Škvor et al, 1992;Wong, 1993) in which a feedback path is created in order to build up and sustain oscillations. In order to vary the oscillation frequency in a prescribed range is possible to introduce a varactor in the feedback loop or use some advanced techniques like the "current steering" in (Wu & Hajimiri, 2000).…”

Section: Introductionmentioning

confidence: 99%