Location History:
- Austin, TX (US) (2000)
- Coopersburg, PA (US) (2001 - 2003)
Company Filing History:
3 out of 163 
2 out of 2,316 
2 out of 122 
Years Active: 2000-2003
Title: Innovations of Stephen T Janesch
Introduction
Stephen T Janesch is a notable inventor based in Coopersburg, PA (US). He holds a total of 9 patents that showcase his contributions to the field of digital communications and frequency synthesis. His work has significantly impacted the performance of various communications systems.
Latest Patents
Among his latest patents is a digital phase locked loop (PLL) frequency synthesizer that utilizes a 1-bit numerically controlled oscillator (NCO). This innovation negates the requirement for a voltage-controlled oscillator (VCO) frequency to be an integer multiple of its reference frequency. By employing a direct digital synthesizer (DDS) or NCO in the feedback path of a PLL, Janesch's invention allows for fine frequency control and rapid settling times. This advancement overcomes the conventional integer-ratio relationship between the reference frequency and the synthesized output frequency, leading to improved VCO phase noise and quicker settling times in communications systems.
Another significant patent addresses the compensation of frequency pulling in time-division duplexing (TDD) and time-division multiple access (TDMA) radio transceivers. This digital carrier-recovery loop includes a signal input, a digitally-controlled oscillator (DCO), a phase detector, a loop filter, and a memory. The memory stores an initializing value for the DCO, enabling rapid initialization at the start of a received frame. This method enhances the performance of TDD and TDMA transceivers by ensuring accurate carrier recovery throughout the data frame.
Career Highlights
Stephen T Janesch has worked with prominent companies such as Dsp Group Limited and Agere Systems Inc. His experience in these organizations has contributed to his expertise in digital communications and frequency synthesis.
Collaborations
Throughout his career, Janesch has collaborated with notable individuals, including Paul G Schnizlein and Carl R Stevenson. These collaborations have further enriched his work and innovations in the field.
Conclusion
Stephen T Janesch's contributions to digital communications through his patents and innovations have made a significant impact on the industry. His work continues to influence advancements in frequency synthesis and carrier recovery systems.
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