USA patents
3,716,780 System For The Accurate Reproduction Of Pulse Code Modulation Signals Received As An Unfavorable Signal-To-Noise Ratio Around 1973 I was involved in the development of a telemetry system for the third stage of the ELDO rocket. A number of sensors delivered an analog signal between 0 and 5 volts. I developed a commutator that received all these signals and connected these one by one to an Analog to Digital converter that produced a series of 8 bit digital numbers (Bytes) that were transmitted to an ground station as a series of bit values. There a so called Bit Synchroniser reproduced the transmitted bit values. At that time the performance of typical Bit Synchronisers was poor when the Signal-To-Noise Ratio was small, resulting in loss of data. My contribution was an improved bit detector that performed close to the theoretical optimum. 3,753,141 Wide Frequency Range Voltage Controlled Oscilator With Crystal Controlled Frequency Stabilizing Loop Bit Synchoni...