چکیده: در ایـن مقاله طراحی یک مبدل زمان به دیجیتال 12 بیتی رزولوشن بالا و توان مصرفی کم مبتنی بر اسیلاتور حلقوی چند­مسیره (multi-path gated ring oscillator) در تکنولوژی nm-cmos130 بیان شده است. برای افزایش رزولوشن دو مسیر گیت با رزولوشن­های متفاوت، رزولوشن درشت و رزولوشن ریز، به­صورت ساختار ورنیر استفاده شده است. تأخیر گیت هر مسیر تعیین­کننده رزولوشن آن مسیر و به دلیل به ­کار بردن آن­ها در ساخت...

An Asynchronous Gated Ring Oscillator based Time to Digital Converter (A-GRO-TDC) is proposed. Gating functionality is added to a simple Ring Oscillator which drastically improves the system performance with asynchronous operation. Energy saving is possible due to scrambling and first order noise shaping. The proposed 9 bit A-GRO-TDC is implemented in Cadence using 0. 18μm digital CMOS Technolo...

An 80MS/s analog-to-digital converter (ADC) based on single-slope conversion is presented which utilizes a recently developed gated ring oscillator (GRO) time-to-digital converter (TDC) to achieve an ENOB of 6.45 bits. To save power, the time-to-digital conversion is done in two steps, the first of which is based on coarse time quantization as measured by cycles of an oscillator and the second ...

This paper presents performance analysis of Gated Ring Oscillator (GRO). Proposed GRO is designed to employ in implementation of Time to Digital Converter (TDC) block of Asynchronous ADC. For an audio frequency range ADC, minimum GRO stages are designed using asynchronous technique. So leads to reduced area and power. Compared to conventional Ring Oscillator (RO), we avoided to employ the gated...

Abstract We present a small-area second-order all-digital time-to-digital converter (TDC) with two frequency shift oscillators (FSOs) comprising inverter chains and dynamic flipflops featuring low jitter. The proposed FSOs can maintain their phase states through continuous oscillation, unlike conventional gated ring oscillators (GROs) that are affected by transistor leakage. Our proposed FSOTDC...

BACKGROUND/PURPOSE Skin tissue dielectric constant (TDC) measurements at 300 MHz provide non-invasive data on free and bound tissue water. TDC-data is available for some body sites, but most is for female forearm. Contrastingly, there are no data on face-skin or comparative data between genders. Our goals were to obtain facial-TDC reference values and determine if TDC-values differ between gend...

An easily measured, non-invasive, quantitative estimate of local skin tissue water is useful to assess local lymphedema and its change. One method uses skin tissue dielectric constant (TDC) values that at 300 MHz TDC depend on free and bound water within the measurement volume. In practice such measurements have been done with a research-type multi-probe, but recently a hand-held compact-probe ...

Backround. Thyroglossal duct cyst (TDC) is a developmental abnormality of the thyroid gland. Due to embryological remnants of thyroid tissue located in the TDC, the same malignant tumors that develop in the thyroid gland can also develop in the TDC. Methods. We present the unique case of a 39-year-old female with simultaneous de novo papillary carcinoma in a TDC and the thyroid gland. Results. ...

We are developing an ultra-high resolution timeto-digital converter (TDC) based on a novel scheme combining a digital “coarse” TDC and analog “fine” TDC. The coarse TDC is derived from a previously reported RSFQ time digitizer based on binary counters. The fine TDC is based on an analog prescaler. A 31 GHz counter defines the coarse (~32 ps) time resolution, while the prescaler provides a fine ...