Abstract: An electrical lead body for an implantable electronic medical device has multiple layers of insulating material encapsulating a conductor that is wound in a spiral manner along the length of the lead. The layered structure provides resistance to fracture from mechanical stresses. A manufacturing process for producing this electrical lead is described.

Abstract: A scan chain for testing sequential logic circuitry includes a number of concatenated storage elements having a feedback loop from the output of the last storage element to the input of the first storage element. The storage elements are clocked by a chain clock signal at a frequency multiple of a base frequency. The number of storage elements in the scan chain is a relative prime with respect to the frequency multiple. Scan chains running at different frequency multiples of the base frequency may be concatenated with the output of the last storage element of one scan chain being coupled to the input of the first storage element of the next scan chain. Wherever the output of a storage element clocked on a leading phase of the chain clock signal is coupled to the input of a storage element clocked on a trailing phase of the chain clock signal, a buffer is inserted to buffer the output to the input.

Abstract: A circuit to control the RF drive to a gridded traveling wave tube (GTWT) to operate the tube in saturation across the entire RF band and at all PRF's and pulse widths. Control is attained by sensing the GTWT output and using a feedback circuit to vary an input variable attenuator to the GTWT based upon whether the output is increasing or decreasing.