A 3.35 microsecond HACT transversal filter

Merritt, S.W.; Tanski, W.J.; Cullen, Donald E.; Sacks, R. N.; Branciforte, E.J.

doi:10.1109/ultsym.1989.66984

Cited by 4 publications

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…-r a t e with the HACT device has also baen achieved. combined in phase quadrature can provide arbitrary phase and amplitude weighted taps [5]. circuits of this type have application to fixed bandpass filters and asynchronous correlation matched filters for spread spectrum decoding and spectral filter banks.…”

Section: Introductionmentioning

confidence: 99%

HACT device applications

Cullen¹,

Grudkowski²,

Merritt³

et al.

IEEE Symposium on Ultrasonics

Self Cite

View full text Add to dashboard Cite

A C T Heterojunction Acoustic charge Transport (HACT) tranrrveroal filters have been successful operated with charge transport efficiency of 0.9996 for 6 microsecond devices and > 0.9999 for 3.3 microsecond devices having uniform tap weighting. Device delays in excess of 10 microseconds should be possible. Results for HACT devices having apodieed tap weights are presented ancl demonstrate accurate tire and frequency response characteristics. Harping filter sidelobes are close to theory. Phase weighting of HACT taps resulted in excellent device matched filter response to a nested Barker code input. Transversal equalization, or pulse sharpening, is also demonstrated for an exponential input and reflects the good baseband response of the -ice.

show abstract

Section: Introductionmentioning

confidence: 99%