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Prognosis of solid cancers is generally more favorable if the disease is treated early and efficiently. A key to long cancer survival is in radical surgical therapy directed at the primary tumor followed by early detection of possible progression, with swift application of subsequent therapeutic intervention reducing the risk of disease generalization. The conventional follow-up care is based on regular...
In this paper we introduce an extension of the self-temperature-sensing of stress compensated (SC) quartz resonator based on simultaneous excitation of two overtones (3rd and 5th overtone) - the slow thickness-shear modes (i.e. the c modes) in dual-mode crystal oscillator (DMXO). The extension is based on implementation of a self-identification of the differences between aging rates (long-term frequency...
This paper deals with evaluation of self-temperature-sensing of stress compensated (SC) quartz resonator with simultaneous excitation of three higher overtones-the slow thickness-shear modes (i.e. the c-modes) in multi-mode crystal oscillator (MMXO). We have designed the MMXO especially for excitation of three c-modes in standard 10-MHz 3rd overtone SC resonators: the 3rd overtone, the 5th overtone...
This paper deals with dual-mode crystal oscillator (DMXO) based on two modified Butler's oscillators using a quartz resonator as frequency stabilization element and sensor element of its own temperature as well. The main attention is devoted to the amplitude condition of oscillations excitation. This issue was investigated by means of so called regeneration coefficient that was obtained for the treated...
This paper deals with evaluation of self-temperature-sensing of stress compensated (SC) quartz resonator with simultaneous excitation of two higher overtones - the slow thickness-shear modes (i.e. the c-modes) in dual-mode crystal oscillator (DMXO). Two different combinations of overtones simultaneously excited in the standard 10-MHz 3rd overtone SC-cut resonator are compared here: - the 5th overtone...
The paper deals with a crystal oscillator with differential amplifier based on bipolar junction transistors. The main attention is devoted to the influence of loss resistance of the used piezoelectric resonator to the gain at the corresponding open feedback loop. The derived relation for this gain corresponds with relevant results obtained by means of computer simulations.
The paper introduces novel dual-mode crystal oscillator (DMXO) that employs a standard 10 - MHz 3rd overtone stress compensated (SC) quartz resonator. In the DMXO, the two overtones (c-modes) of the SC-cut resonator are simultaneously excited: the 3rd overtone and the 5th overtone. The ability of utilization of the two excited overtones to implement the resonator self-thermometry we have evaluated...
The paper deals with a crystal oscillator with piezoelectric quartz resonator connected between base of a bipolar junction transistor and ground. The main attention is devoted to the influence of loss resistance of the used piezoelectric resonator to the gain at the corresponding open feedback loop.
The paper deals with a reduction of static frequency vs. temperature (f-T) dependency of digitally generated sinusoidal signals. The f-T dependency reduction is based on a self-temperature-sensing of a quartz crystal in dual-mode crystal oscillator, which produces the reference clock. We have proposed a digital oscillator, which automatically compensates the f-T dependency of its sampling clock over...
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