Analog Circuit Design

How to Avoid Big Errors Using Accelerometers

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.

Prototype Catheter Measures Heart Muscle

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.

How To Reduce Noise In Test Systems

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:

Using ZigBee to Integrate Handheld Tester

Voler was approached by a service provider with a need for handheld HVAC testers that service field representatives could use when they go to residences and businesses to perform an energy audit for the owners' heating and air-conditioning systems.

Voler worked with the IT manager and a lead user to develop a written specification to meet their needs. Together we developed a proposal for a testing system with three remote units that are wirelessly connected to a master that plugs into the USB port on a PC.