Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Generating sawtooth or triangular output
Patent
1995-06-06
1996-12-17
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Generating sawtooth or triangular output
327131, 327140, 327360, H03K 408, H03K 490
Patent
active
055857531
ABSTRACT:
A sawtooth generates a sawtooth wave having a high response speed and good linearity with a simple arrangement in converting a change in phase of an input signal into a linear level change. A signal interpolating apparatus uses this sawtooth wave to output a predetermined signal (interpolation signal) every predetermined phase change of the input signal with a simple arrangement. An arithmetic operation section receives two sinusoidal signals A and B having equal periods and phases which are offset by 90.degree. and with respect to each other, obtain a signal X=A/(B+a) and a signal Y=A/(B+B) using constants .alpha. and .beta. respectively satisfying B+.alpha..apprxeq.0 and B+.beta..apprxeq.0. A switching unit selects the linear ramp portions of the signals X and Y to output a continuous sawtooth wave. On the basis of the value of this sawtooth wave, a desired interpolation signal is output from a memory which stores predetermined data.
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patent: 5041829 (1991-08-01), Garrett
patent: 5079511 (1992-01-01), Donat
Interpolating of Measurement Signals; pp. 8-9; "The Complete Catalog of Heidenhain Co., Ltd. of Japan"; Nov. 1992.
Endoh Hiroaki
Ishiwata Muneo
Anritsu Corporation
Callahan Timothy P.
Englund Terry L.
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