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TRANSISTOR CLAMP Disclosure Number: IPCOM000006036D
Original Publication Date: 1990-Oct-01
Included in the Prior Art Database: 2001-Nov-28
Document File: 2 page(s) / 69K

Publishing Venue


Related People

David Moore Graham Bell


The RFPA is the next generation Power Amplifier for the Motorola GSM Base Station Infrastructure. The following design of Transistor Clamp solves a number of initial problems during development, namely: -to produce mechanical support for a printed circuit board at right angles to the mounting face; - to transfer the thermal output of a number of TO.220 style transistors to a heatsink (up to 30 Watts maximum); - to insulate each transistor; - to operate without degradation in temperatures in excess of 100 degrees C; - to provide constraint to cableforms to prevent trapping; -to be manufacturable within the constraints of reflow solder techniques; -to reduce the parts count and improve assembly time.