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Heterojunction acoustic-charge-transport fixed-tap transversal filter

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7 Author(s)
Merritt, S.W. ; United Technol. Res. Center, East Hartford, CT, USA ; Tanski, W.J. ; Cullen, Donald E. ; Sacks, R.N.
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A heterojunction acoustic-charge-transport (HACT) transversal filter with a 3.35- mu s-long array of output electrodes is discussed. The device operated at an acoustic clock frequency of 143.6 MHz with a charge transfer efficiency in excess of 0.9999. The impulse response and swept frequency response of the device were nearly ideal. On the basis of measurements of the 1-dB compression point, the third-order intercept, and the noise floor of the device, a thermal dynamic range of 80 dB and a spurious free dynamic range of 62 dB were demonstrated over a 300-kHz bandwidth. The device exhibited 12 dB of gain when embedded in a 50- Omega system.<>

Published in:

Electron Device Letters, IEEE  (Volume:11 ,  Issue: 3 )