A low-power spur-free precision amplifier, which uses input chopping and correlated double sampling for demodulation, is presented. This circuit employs an AC coupling between the first and the second stage that removes the first stage offset without causing ripple. The input rail-to-rail circuit, fabricated in a mixed 0.18–0.5 m CMOS technology, operates with supply ranging from 1.8 V to 5 V. ...

background: radiotherapy is an established therapeutic modality for prostate cancer. resveratrol, a natural antioxidant, has been shown to inhibit carcinogenesis and to block the process of tumor initiation and progression. no data is available on the response of cellular spheroid to reseveratol. in this study we have examined the effect of resveratol on the radiation response of human prostate...

background: rad51 is a protein with critical role in double strand break repair. down-regulation of this protein has a significant effect in radiosensitivity of some cell lines like prostate carcinoma. compared to monolayer cell culture model, the spheroids are more resistant to radiation. the aim of the current study was to determine the rad51 protein level in du145 spheroids, and monolayer ce...

In this brief, a theoretical analysis on the limits of conventional chopper stabilization technique is presented and a solution conceived to improve the amplifier performance is proposed. The expected replicas of the 1 noise at the chopping frequency and its multiples are attenuated by a modified chopping control. Simulations done by using records of real 1 noise outputs showed that, by followi...

ABSTRAKSemakin meningkatnya berbagai olahan makanan, produsen bawang goreng dituntut untuk lebih mampu memenuhi kebutuhan UKM dan pasar yang semakin meningkat. Penggunaan alat atau mesin dalam proses produksi dirasa sangat penting guna menunjang tersebut. Tujuan dari penelitian ini adalah mendesain sebuah perajang dengan kapasitas 50 Kg/jam.Metode digunakan perancangan meliputi analisa kebutuha...

Bài báo này đã hệ thống hóa tư liệu điều tra, thám sát và khai quật ở các địa điểm Đá cũ vùng An Khê, tỉnh Gia Lai; xác định đặc trưng cơ bản của kỹ nghệ Khê với phức hợp kỹ thuật công cụ: Chopper- Choping tool/Mũi nhọn (Piks) hình khối tam diện/Bifaces - Handaxes. Trong đó, chopper-choping chủ yếu ở khu vực châu Á, bifaces handaxes nổi trội cho phương Tây cụ diện là nét riêng sớm (Việt Nam). K...