A Highly Integrated 1.8 GHz Frequency Synthesizer Based on a MEMS Resonator

Nabki, Frédéric; Allidina, Karim; Ahmad, Fazil; Cicek, Paul-Vahé; El-Gamal, M.N.

doi:10.1109/jssc.2009.2022914

Cited by 60 publications

(38 citation statements)

References 43 publications

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“…Hence, the required "Transimpedance gain" should be greater than 20 log 10 (698 k Ã 1:5) or, 120.39 dB-Ω. As shown in Table I, the total 'transimpedance' gain has been achieved as 122 dB-Ω at MEMS resonant frequency of 17.22 MHz, which fulfills the criteria highlighted above [5]. Additionally, total phase shift achieved is À70 0 , which is nearly nullifying MEMS phase shift of þ95 0 as found from S 21 data in Fig.…”

Section: Resultsmentioning

confidence: 70%

“…5], a highest 135 dB-Ω gain has been achieved for the sustaining amplifier and at resonant frequency, it is 122 dB-Ω, as shown in Table I. But based on the conventional MEMS oscillator theory in F. Nabki's work in 2009 [5], at least 1.5 times of motional resistance can be targeted to set the minimum transimpedance gain in designing a CMOS sustaining amplifier. Hence, the required "Transimpedance gain" should be greater than 20 log 10 (698 k Ã 1:5) or, 120.39 dB-Ω.…”

Section: Resultsmentioning

confidence: 99%

“…CMOS MEMS based resonator also offers the avenue of single chip integration, inheriting small form factor in area with high quality factor (Q > 40; 000) and less power consumption, which favorably penetrates the market of the timer circuit highlighting the compliance to Moore's law [2,3,4]. But, the high insertion loss of MEMS devices which results from their low Q and high motional resistance (up to several kΩ) [5], is the first major obstacle to overcome. In this work, a CMOS operational amplifier is designed which replenishes all the motional losses of a clamp-clamp (C-C) beam Si-MEMS resonator in realizing a single chip oscillator.…”

Section: Introductionmentioning

confidence: 99%

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Designing a new high gain CMOS amplifier towards a 17.22 MHz MEMS based Si oscillator for a cost effective clock generator IC

Roy

Ramiah

Reza

2015

IEICE Electron. Express

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A novel sustaining amplifier is designed and characterized for a Si-based MEMS resonator, in implementing a reference oscillator in 180 nm CMOS process. A two port electrical model of the MEMS resonator is used to compute the insertion loss (−76 dB) and phase shift (95°). Total open loop transimpedance gain is achieved as 122 dBΩ with −70°phase shift, at the resonant frequency of 17.22 MHz. This amount of gain is investigated as capable to sustain MEMS resonator's oscillation, in the realization of a cost effective, miniaturized and low power CMOS reference oscillator which oversees on application in clock generation.

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Section: Resultsmentioning

confidence: 70%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Designing a new high gain CMOS amplifier towards a 17.22 MHz MEMS based Si oscillator for a cost effective clock generator IC

Roy

Ramiah

Reza

2015

IEICE Electron. Express

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“…Pierce circuit topology and TIA circuit topologies in [7]- [10], [14]- [16] was simulated using MIMOS 0.35µm technology. Their DC simulation results are summarized in Table 1.…”

Section: Oscillator Topologiesmentioning

confidence: 99%

Performance Comparison of Oscillator Circuit Topology for MEMS SAW Resonator

Nurashikin¹,

Karim²,

Rosman³

2015

Third International Conference on Advances in Applied Science and Environmental Technology - ASET 2015

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Abstract-This paper presents the simulation results and the performance comparison for three different pierce oscillator circuit topologies. The oscillators were based on the CMOS MEMS SAW resonator. The designs were simulated using 0.35um CMOS technology. Design_3 has the best phase noise performance and settling time as compared to the other two topologies namely Design_1 and Design_2. The settling time for Design_3 was 10ns and the phase noise performance was -90.3dBc/Hz at 10-kHz offset frequency. Design_2 required 40ns to achieve stability where the phase noise performance was -80.1dBc/Hz at 10-kHz offset frequency. Meanwhile, Design_1 required 30ns before it could achieve stability and the phase noise performance was -56.8dBc/Hz at 100-kHz offset frequency. Phase noise performance was the most important criteria for oscillator where in most cases, the resonator used in an oscillator must have high Q in order for the oscillator to have good phase noise performance. However, the sustaining amplifier circuit could also be used to improve the phase noise performance of the oscillator.

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“…Due to the Electrostatic force the beam will bend and beam will oscillates by applying ac signal at fixed electrode. The resonance frequency is given by [2], [1], [3] …”

Section: Principlementioning

confidence: 99%