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ARM系列文档3
Strategies Methodologies
Reducing Complexity and Cost
for Portable Medical Electronics
with SOCs
By Sanjeev Kumar, Applications Engineer, Cypress Semiconductor
ortable medical electronics has seen tremendous growth be amplified using a high-gain instrumentation amplifier with a
and adoption in the recent years. More new variants are good common mode re ection ratio (CMRR). Usually the gain and
P CMRR need to be around 150 and 100 dB respectively. The fre-
being introduced into the market by an increasing number
of new companies. The need of the hour is better mass producible quency of oscillatory pulses in the pressure signal lies between
designs which are low in complexity and to provide
acceptable performance to keep the cost of the device
low. To achieve this, designers need to consider
power efficiency, cost, form factor, and FDA certifica-
tion of components, among other factors.
A typical portable medical electronic system compris-
es components such as analog front-ends for data
acquisition, amplifiers and filters for signal condition-
ing, analog-to-digital (ADC) converters for signal
and sensor data acquisition, buttons to accept user
feedback, an MCU to execute algorithms, and a
variety of interfaces such as an LCD display, USB
port and so on. Traditional design methodologies
bring together all of the required components onto a
PCB. This method increases the overall system BOM,
PCB complexity, and design cycle. Using individual
analog components also reduces analog IP protection
as the system can be reverse engineered easily. Figure
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