Blood Pressure Monitor | Cypress Semiconductor
Portable blood pressure monitors are a common medical device used for clinical and home monitoring purposes. The oscillometric method is the most common method for measuring blood pressure today. In the oscilometric method, the intra-arterial pulsation is transmitted via cuff to transducer while systolic and diastolic pressure are estimated from the amplitudes of the oscillation by using an empirical algorithm. Modern blood pressure monitors typically include a pressure sensor that transmits a signal that must be amplified and filtered before being sent into an ADC. Typical blood pressure monitors will also include a heart rate timer, a safety timer, a display, and Pneumatic control. Blood pressure monitors are typically battery powered, therefore low power consumption is also a key design consideration.
PSoC provides all the required circuitry to control a portable blood pressure monitor with a single chip, integrated solution. This includes controlling the actuators for inflating and deflating the cuff, the analog circuitry required for reading the pressure sensors, timers, user interface and display. PSoC also provides the opportunity for users to implement value-add features such as CapSense, USB, and Made for iPod support.
AN52927 demonstrates how easy it is to drive a segment LCD glass using the integrated LCD driver in PSoC 3 and PSoC 5LP. This application note gives a brief introduction to segment LCD drive features and provides a step-by-step procedure to design Segment LCD applications using the PSoC Creator tool.
AN57821 introduces basic PCB layout practices to achieve 12- to 20-bit performance for the PSoC 3, PSoC 4, and PSoC 5LP family of devices.
AN58304 provides an overview of the analog routing matrix in PSoC® 3 and PSoC 5LP. This matrix is used to interconnect analog blocks and GPIO pins. A good understanding of the analog routing and pin connections can help the designer make selections to achieve the best possible analog performance. Topics such as LCD and CapSense routing are not covered in this application note.
AN58726 is a continuation of basic-level AN57473. It describes additional features of the USB Human Interface Device (HID) protocol, including input and output transactions and composite devices, using PSoC® 3 and PSoC 5LP and the PSoC Creator USBFS Component. A variety of HID devices, including a keyboard with LEDs and a composite device, are used as examples. This application note is a prerequisite for the advanced-level AN56377 and AN82072.
AN58827 discusses how internal trace and switch resistance can affect the performance of a design and how these issues can be avoided by understanding a few basic details about the PSoC® 3 and PSoC 5LP internal analog architecture.
The CY8CKIT-001 PSoC® Development Kit (DVK) provides a common development platform where you can prototype and evaluate different solutions using any one of the PSoC 1, PSoC 3, PSoC 4, or PSoC 5 architectures.
The PSoC® CY8C28 Family Processor Module is designed to evaluate and experiment with Cypress's PSoC 1 programmable system-on-chip design methodology and architecture. This processor module can be used in conjunction with the PSoC Development Kit (CY8CKIT-001) to create designs utilizing on-board DVK resources or compatible expansion boards. This kit provides you with an additional processor module to use with different projects.
The CY8CKIT-029 PSoC® LCD Segment Drive Expansion Board Kit allows you to evaluate PSoC's LCD drive capability using LCD segment component in Cypress's PSoC Creator™.
These demonstration video shows a PSoC®1 based non invasive blood pressure monitor. This design does not use any external active components to buffer, amplify, and filter the signal.
Software and Drivers
- PSoC Creator
PSoC Creator is a state-of-the-art software development IDE combined with a revolutionary graphical design editor to form a uniquely powerful hardware/software co-design environment.
- PSoC Designer
PSoC Designer is the revolutionary Integrated Design Environment (IDE) that you can use to customize PSoC to meet your specific application requirements. PSoC Designer software accelerates system bring-up and time-to-market.