Front End Board

Front End Board

M1351A (M1353-66501 and

M1353-66511)

The Frontend board (M1353-66501 − single, M1353-66511 - dual) contains the analog circuitry for measuring all the possible parameters of the M1351A. One IC on the board provides the US timing and window control. Each type of transducer has a specific mode resistor which is recognized by the M1351A when the transducer is connected to an input socket. In this way, the user can be warned if a wrong transducer is connected. The marker cable is also connected to the Front End Board.

The frontend boards used with software at Rev E and higher are triangular in shape, not rectangular.

Ultrasound

The ultrasound transducer transmits 998.4kHz ultrasound bursts which are generated by the digital control ICs. The burst widths are controlled by software. The transmitter amplifier supplies 5Vpp_ at the Cardio sockets. The repetition rate is 3.2kHz. The received 998kHz signal is amplified by a high frequency amplifier with a gain of 120 and then split to provide a reference path a and a compare path b. The two demodulators a and b are independently controlled by software in their receive windows by the control ICs. The demodulated LF signals are bandpass filtered (100 to 450Hz) and amplified by a software controlled gain of 180 to 1860 in eight steps. The FMP-LF path is independently demodulated, bandpass filtered and amplified by a factor of 18.

Toco

The excitation voltage is a biphase 2.4kHz rectangular continuous wave with an amplitude of 5Vpp. The frequency is generated in the control chip by dividing the 4MHz system clock.

the sense input is amplified by 786 (5∝ ;V/V/mmHg), rectified with a synchronous detector and lowpass filtered with a cut-off frequency of 7.5Hz.

M1353A Used in monitors with serial number prefix ≤ 3652G.

(M1353-66512)

The Frontend board contains the analog circuitry for measuring all the possible parameters of the M1353A. An IC on the board provides the US timing and window control, and

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Chapter 6 Theory of Operation

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Philips M1353A manual Front End Board, M1351A M1353-66501 M1353-66511, M1353-66512
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M1353A, M1351A specifications

Philips M1351A and M1353A are advanced medical monitoring devices designed to enhance patient care in various healthcare settings. These monitors are widely recognized for their precision, reliability, and user-friendly interface, making them essential tools for clinicians and healthcare providers.

The Philips M1351A is a compact portable monitor specifically tailored for adult, pediatric, and neonatal care. It is equipped with multiple physiological parameters, enabling healthcare professionals to track vital signs such as heart rate, respiratory rate, non-invasive blood pressure, and temperature. One of its standout features is the ability to display real-time waveforms, providing clinicians with instant access to critical patient information.

On the other hand, the Philips M1353A builds on the M1351A's robust capabilities, integrating advanced features that enhance monitoring capabilities. This model includes additional measurement modalities such as invasive blood pressure and capnography, allowing for comprehensive patient management. Its larger screen provides clear, easy-to-read data, and its intuitive interface ensures quick navigation through the various monitoring functions.

Both monitors utilize state-of-the-art technologies to ensure accurate and reliable measurements. The smart algorithm used in these devices minimizes the possibility of false readings, providing healthcare professionals with the confidence needed for effective clinical decision-making. The Philips M1351A and M1353A also feature an integrated alarm system that notifies caregivers of critical changes in patient conditions, ensuring timely interventions.

In terms of connectivity, these models facilitate seamless integration with hospital networks and electronic medical records (EMR) systems. This interoperability enhances the overall workflow in a clinical environment, allowing patient information to be shared efficiently amongst healthcare teams.

Additionally, the Philips M1351A and M1353A are designed with patient comfort in mind. They are lightweight and portable, making them suitable for diverse environments, from emergency departments to patient transport. Their rugged design ensures durability in high-paced settings, meeting the rigorous demands of modern healthcare.

In summary, the Philips M1351A and M1353A monitors serve as essential tools in contemporary medical practice, offering comprehensive monitoring capabilities, advanced technologies, and a user-centric design. These features collectively contribute to improved patient outcomes and enhanced overall healthcare delivery.
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