Petrie Johan Van Der Plaats

Title: The Innovations of Petrie Johan Van Der Plaats

Introduction

Petrie Johan Van Der Plaats is a notable inventor based in Hilversum, Netherlands. He has made significant contributions to the field of audio transmission technology. With a total of 3 patents to his name, his work has had a lasting impact on telecommunications.

Latest Patents

One of his latest patents is an audio transmission circuit comprising a transmit amplifier. This amplifier stabilizes the line direct voltage of the audio transmission circuit of a telephone set with respect to a reference voltage. The amplifier gain is adjustable to a high value by means of a resistor that does not affect the further properties of the audio transmission circuit. Additionally, the variation of the line direct voltage by the offset current of the microphone pre-amplifier preceding the transmit amplifier, and by temperature fluctuations of the reference voltage, is greatly reduced by increasing the reference voltage and adding a temperature-dependent current source to a voltage divider within the amplifier. Another significant patent is a circuit arrangement for a tone pushbutton selection telephone subscriber. This arrangement includes a tone signal generator and a microphone amplifier coupled to direct current networks, which are connected to an output network. This design results in two current mirror circuits having the same current ratio factor, ensuring that the direct current flowing in the output network maintains a constant value.

Career Highlights

Petrie Johan Van Der Plaats is associated with U.S. Philips Corporation, a leading company in the electronics industry. His work at Philips has allowed him to innovate and develop technologies that enhance audio transmission systems.

Collaborations

Throughout his career, he has collaborated with notable colleagues such as Peter J Sijbers and Henricus J Otten. These collaborations have contributed to the advancement of technology in their respective fields.

Conclusion

Petrie Johan Van Der Plaats is a distinguished inventor whose contributions to audio transmission technology have been significant. His patents reflect his innovative spirit and dedication to improving telecommunications. His work continues to influence the industry today.