Multiple Notch Filter Using On-Die BAW MIM Cap

Antennaplexers and other multiplexers often use notch filters to create a wider passband than achievable with a standard bandpass filter. When using a notch filter in this way, it is often required to provide multiple reject bands to provide isolation to other ports. Previously this has been achieved by using multiple acoustic notch filters or by adding an external tank circuit using SMDs. While the tank inductor can be embedded within the module laminate, the capacitor typically cannot and requires an SMD. Implementing this capacitor on the BAW die as a MIM allows increased integration and enables multiple reject bands on a single die. The BAW MIM capacitor has previously been described for use as a de-coupling capacitor and matching element, but this is the first known application to notch filters for a multi-notch configuration. This can be accomplished using a reflector or passivation layer MIM capacitor

IVDAC

The invention is a circuit that combines a VDAC (Digital to Analog Converter Voltage source) and an IDAC (Digital to Analog Converter Current source) into one circuit. This is done by reusing the largest elements of the IDAC for the VDAC. The circuit is either in the mode of a VDAC or an IDAC. The two circuits have three main elements which are: Opamp, feedback and output stage. The elements which are shared between the two circuits are the Opamp and the output stage

Water-conservation device and method

Device and method to conserve water by controlling the flow of water depending on user input, water temperature, human presence and duration. The device consists of a MEMS chip with sensors to measure force, temperature and infrared energy and integrated CMOS control circuitry and a ball valve

AMR PROTECTION

The present disclosure relates to a detector for radio frequency (RF) swing and direct current (DC) voltage that is connected to Vcc1. Output of the detector is connected to the bias circuit. A high RF swing and/or collector DC voltage reduces the bias of Q2. The combination of high input drive detection and/or high collector voltage detection creates an effective protection of the module at the absolute maximum ratings (AMR) conditions. The output of the detector is fed to the bias circuit in the feedforward scheme in which Q2 bias current is reduced at high voltage and high module drive. The disclosed device does not require additional circuits, that is, in the complementary metal oxide semiconductor

High Power Balanced Amplifier Combiner

This paper proposes changing the Lange from a 50ohm impedance to a 25 ohm impedance. Changing the Lange from 50 ohms to 25ohms and adding a 25ohm to 50 ohm Trifilar transformer on the output will allow for much higher power balanced amplifiers on thin substates like 50um GaN. The topology could also be used on other substrate materials like Alumina to make the trace widths larger so that you can work at higher frequency and power levels

Enhanced LNA Control Methods and Circuit Techniques

A controller for but not limited to low noise amplifiers (LNAs) providing improved yield, lower area, lower power, improved performance and improved production test calibration by leveraging innovative architectures and methodologies.Key areas of focus:- Single or multi-transistor LNA core & bias improvements to more precisely control and match both operating current densities and terminal voltages- Generating more precise LNA voltage bias control and matching- Reduced area and powerTechniques, methods and circuits are broad and generally applicabl

Acoustic LP filtering for High Frequency Spurious Harmonics Rejections

Eliminating Harmonic content generated in modern RF modules is very important for the overall system performance as well as the end User’s experience. Additional filtering is used in several stages of such Mid/High Band modules used for LTE/5G and other mobile applications. Most of those make use of traditional LC filtering offering rejection level in the order of 10-15dB at a targeted frequency range. Those increase the system losses and result in higher NF and current consumption. An alternative, utilizing BAW resonators forming a Low Pass (LP) can reduce the losses and cost, providing rejections better than 20dB across a very wide range of frequencies. That could improve the on-phone interference between RF systems such as MHB SPADS for LTE, UWB, UHB, Wi-Fi to name a few

Utilisation of sexual health services by female sex workers in Nepal

Background The Nepal Demographic Health Survey (NDHS) in 2006 showed that more than half (56%) of the women with sexually transmitted infections (STIs), including HIV, in Nepal sought sexual health services. There is no such data for female sex workers (FSWs) and the limited studies on this group suggest they do not even use routine health services. This study explores FSWs use of sexual health services and the factors associated with their use and non-use of services. Methods This study aimed to explore the factors associated with utilisation of sexual health services by FSWs in the Kathmandu Valley of Nepal, and it used a mixed-method approach consisting of an interviewer administered questionnaire-based survey and in-depth interviews. Results The questionnaire survey, completed with 425 FSWs, showed that 90% FSWs self-reported sickness, and (30.8%) reported symptoms of STIs. A quarter (25%) of those reporting STIs had never visited any health facilities especially for sexual health services preferring to use non-governmental clinics (72%), private clinics (50%), hospital (27%) and health centres (13%). Multiple regression analysis showed that separated, married and street- based FSWs were more likely to seek health services from the clinics or hospitals. In- depth interviews with 15 FSWs revealed that FSWs perceived that personal, structural and socio-cultural barriers, such as inappropriate clinic opening hours, discrimination, the judgemental attitude of the service providers, lack of confidentiality, fear of public exposure, and higher fees for the services as barriers to their access and utilisation of sexual health services. Conclusion FSWs have limited access to information and to health services, and operate under personal, structural and socio-cultural constraints. The ‘education’ to change individual behaviour, health worker and community perceptions, as well as the training of the health workers, is necessary

Poor numeracy skills are associated with glycaemic control in Type 1 diabetes.

To assess the numeracy and literacy skills of individuals with Type 1 diabetes and determine if there is a relationship with achieved glycaemic control independent of their duration of diabetes, diabetes education, demographic and socio-economic factors

Feedback reporting of survey data to healthcare aides

BackgroundThis project occurred during the course of the Translating Research in Elder Care (TREC) program of research. TREC is a multilevel and longitudinal research program being conducted in the three Canadian Prairie Provinces of Alberta, Saskatchewan, and Manitoba. The main purpose of TREC is to increase understanding about the role of organizational context in influencing knowledge use in residential long-term care settings. The purpose of this study was to evaluate healthcare aides&rsquo; (HCAs) perceptions of a one-page poster designed to feed back aggregated data (including demographic information and perceptions about influences on best practice) from the TREC survey they had recently completed. MethodsA convenience sample of 7 of the 15 nursing homes participating in the TREC research program in Alberta were invited to participate. Specific facility-level summary data were provided to each facility in the form of a one-page poster report. Two weeks following delivery of the report, a convenience sample of HCAs was surveyed using one-to-one structured interviews. ResultsOne hundred twenty-three HCAs responded to the evaluation survey. Overall, HCAs&rsquo; opinions about presentation of the feedback report and the understandability, usability, and usefulness of the content were positive. For each report, analysis of data and production and inspection of the report took up to one hour. Information sessions to introduce and explain the reports averaged 18 minutes. Two feedback reports (minimum) were supplied to each facility at a cost of CAN$2.39 per report, for printing and laminating. ConclusionsThis study highlights not only the feasibility of producing understandable, usable, and useful feedback reports of survey data but also the value and importance of providing feedback to survey respondents. More broadly, the findings suggest that modest strategies may have a positive and desirable effect in participating sites. <br /