Location History:
- Ozone Park, NY (US) (1976)
- Tucson, AZ (US) (1979)
- Vestal, NY (US) (1993)
Company Filing History:
2 out of 164,219 
1 out of 832,880 Years Active: 1976-1993
Title: The Innovations of Robert L Schaaf
Introduction
Robert L Schaaf is a notable inventor based in Vestal, NY (US). He holds a total of 3 patents that showcase his contributions to the field of electrical engineering. His work primarily focuses on capacitance measurement and high voltage circuitry.
Latest Patents
One of Schaaf's latest patents is a method and apparatus for capacitance and leakage testing. This innovative system measures capacitance using a high voltage ramp monitor. A signal net is connected to ground by probes while a constant charging current is applied to the internal planes. A pure capacitive net will exhibit a linear voltage rise proportional to capacitance, allowing its capacitance to be represented by ramp time. Additionally, leakage shorts are detected through residual charge current measurements. The stimulus voltage is maintained for a fixed time after ramping to provide stress testing for the net to internal plane. Measured net capacitance is then compared to nominal net capacitance for short and open detection.
Another significant patent is the reel motor preamplifier. This invention features high voltage and high current circuitry, which includes a push-pull voltage amplification stage connected in tandem with a parallel connected push-pull current amplification stage. In the voltage amplification stage, a pair of bipolar operational amplifiers are connected in parallel and operate in a push-pull manner. The outputs of the amplifiers are connected to the inputs through a current gain regulating means, an isolation means, and a voltage divider means.
Career Highlights
Throughout his career, Robert L Schaaf has worked with prominent companies, including International Business Machines Corporation (IBM). His experience in such a reputable organization has contributed to his expertise in the field of electrical engineering.
Collaborations
Schaaf has collaborated with notable individuals in his field, including Floyd W Olsen and Edward J Tasillo. These collaborations have likely enriched his work and contributed to his innovative patents.
Conclusion
Robert L Schaaf's contributions to electrical engineering through his patents demonstrate his innovative spirit and technical expertise. His work continues to influence the industry and showcases the importance of advancements in technology.