Voler developed a prototype for an audio system with advanced digital signal processing for acoustic echo cancellation, ambient noise cancellation and equalization to maximize performance. The system gets its input through an analog front end that filters, amplifies, and powers microphones. It can also drive multiple speakers through high quality, high performance DACs. In addition, the [...]
Today, motion control has moved well beyond its traditional uses in manufacturing. Medical devices, automotive, robotics and personal tools like smartphones and tablets have all benefited from motion control subsystems with lower cost, lower power, and smaller footprints and packaging due to better miniaturization. The key to harnessing the complexity of the electronics and embedded [...]
We have completed a challenging project that started with a referral from a partner. The liquid biopsy platform project was the design of a complex medical instrument and it required a combination of skills that we are known for: analog circuitry, FPGA, microprocessors, and firmware. The instrument is used for non-invasive liquid biopsies and requires the [...]
Voler was recently approached by a large medical device company that relied on test equipment that had been designed several years earlier by a firm that was no longer available. They ask Voler for help because for the last two years the equipment would periodically fail calibration and was providing inconsistent results. They had done [...]
Accelerometers can be used to measure not only acceleration but also vibration. Historically, accelerometers have seen widespread use in manufacturing production lines and automotive electronics. They are now widely used in portable electronic devices such as cell phones, video game controllers, and cameras. Medical devices increasingly incorporate them to add capabilities to measure motion such as the rate and depth of chest compression.
What Is Signal Conditioning? Signal conditioning is the part of a data acquisition system that interfaces to a sensor. Most sensors require some type of accommodation to turn their input into a linear voltage that can be measured by a data acquisition computer. Often, the signal is too "small" and must be changed to a [...]
Voler developed a circuit to measure the impedance of tissue inside the heart to determine which part of the tissue is infarcted (dead) for use in a prototype cardiac catheter. We worked with a medical device start-up to implement an innovative method to reliably detect the minute differences between healthy and infarcted heart tissue.
Noise is unwanted interference that affects the signal and may distort the information. Noise comes from a variety of sources. Some comes from inside a circuit or device, and some from outside. What creates this noise? Motors generate noise and fluorescent lighting generates noise. Noise gets into a circuit from outside through two fundamentally different ways: