EARLY TRANSISTOR HISTORY AT MOTOROLA

An Interview with Ralph Greenburg

 Historic Semiconductor Devices and Applications

 

Oral History – Ralph Greenburg

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What group did you first join?  Who was in the group and what was the work?

 

As noted above, I was a Jr. Engineer in the Applications department. There were two other engineers and three technicians, and of course Andy who had been employed at the MIT Radiation Lab and knew all about Klystrons and Magnetrons but not much about transistors.  None of us had transistor expertise and in a way that was fortunate as we had no pre-conceived notions what the critters could do. So we all learned by doing.

 

The Applications group did more than experiment with basic circuit designs. We were charged with determining how the transistors behaved under temperature ranges and humidity conditions (we built our own humidity chamber). We did final test and sorted the devices by current gain, frequency and voltage limits. We did the same to competitive devices whenever we could obtain some. We also had to design and wind coils and transformers as all the off the shelf stuff were suitable to work with vacuum tubes.

 

Go To Greenburg Oral History, Page 5

 

September 1956 Motorola Employment AD

 

Shown at right is a section of a 1956 ad from Electronics magazine, offering challenging engineering positions with Motorola in Phoenix, “The Air Conditioned Capital of the World”.  Ralph had joined Motorola two years earlier and the company was continuing to expand at a impressive rate.

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Oral History – Ralph Greenburg

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