The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 17, 1996
Filed:
Jun. 06, 1995
Muneo Ishiwata, Minamiashigara, JP;
Hiroaki Endoh, Isehara, JP;
Anritsu Corporation, Tokyo, JP;
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.