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:
Oct. 14, 1986
Filed:
Dec. 28, 1984
Takeshi Nakata, Shiga, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
An infrared ray detecting apparatus comprises an infrared ray detecting element (5), bimorph elements (8a and 8b), a transistors (53, 54), a DC-DC converter (55), and a volume (56). A square wave signal is applied to a base of the transistor (53) from a microprocessor (40) included in a microwave oven and a signal having a constant level is applied to a base of the transistor (54). The DC-DC converter (55) is continuously driven in response to an emitter output from the transistor (54) so that a constant voltage -E.sub.0 V which is extremely stable is supplied. A voltage -E.sub.s V which is obtained by regulating properly the constant voltage -E.sub.0 V by means of the volume (56), is applied to central electrodes of the bimorphs (8a and 8b), while a square wave signal varying between 0 V and -E.sub.0 V in response to an on/off state of the transistor (53), is applied to a surface electrodes of the bimorphs (8a and 8b). The square wave signal has a round in its leading edge, due to a time constant comprising resistances of R.sub.1, R.sub.2, R.sub.3, r.sub.1, r.sub.2 and electrostatic capacity of the bimorphs (8a and 8b).