E David Haacke

Title: E David Haacke: Innovator in Electrostatic Discharge Protection

Introduction

E David Haacke is a notable inventor based in Westbrook, ME (US), recognized for his contributions to the field of electronic device protection. He holds a total of 3 patents, showcasing his innovative approach to enhancing the reliability of electronic circuits.

Latest Patents

One of Haacke's latest patents is the BICMOS electrostatic discharge protection circuit. This invention features an enhanced bipolar-transistor apparatus designed to protect electronic devices from electrostatic discharge damage. The apparatus utilizes a bipolar transistor coupled between a power rail and the circuit to be protected. The protection mechanism is based on a high-current-capacity path through the bipolar transistor, which is activated either by collector-to-emitter punch-through or by normal conduction initiated by a switch connected to the base of the transistor. The preferred embodiment employs a MOS transistor that undergoes source-to-drain breakdown at a fixed threshold voltage, activating the bipolar transistor to discharge overvoltage effectively.

Another significant patent is the BICMOS output buffer noise reduction circuit. This circuit delivers output signals of high and low potential levels in response to data signals. It features a CMOS output pulldown driver transistor that sources base drive current to a larger bipolar primary output pulldown transistor. Additionally, a smaller CMOS secondary output pulldown transistor is coupled in parallel with the primary transistor to reduce maximum peak output noise. The design includes a feed-forward circuit capacitance that ensures early turn-on of the bipolar output pulldown transistor, thereby minimizing output noise.

Career Highlights

E David Haacke has made significant strides in his career, particularly through his work at National Semiconductor Corporation. His innovative designs have contributed to advancements in electronic circuit protection and noise reduction, making him a valuable asset in the field.

Collaborations

Throughout his career, Haacke has collaborated with notable colleagues, including James R Ohannes and Stephen W Clukey. These collaborations have further enriched his work and contributed to the development of cutting-edge technologies.

Conclusion

E David Haacke's contributions to the field of electronic device protection through his innovative patents highlight his expertise and commitment to advancing technology. His work continues to influence the industry, ensuring greater reliability and performance in electronic devices.