Patents by Inventor Jean Hermann
Jean Hermann has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5856765Abstract: An electronic device (1) has a substrate (2) of monocrystalline silicon on which is an integrated circuit (3). The integrated circuit is an oscillator containing a resonator, a maintenance circuit to cause the vibration of the resonator, and a frequency division chain. The maintenance circuit as well as the division chain are manufactured as CMOS circuits. The resonator is an integrated resonator (4) formed of a body cut out in a delimited surface part of reduced thickness (14) of the substrate (2), of a thin layer of piezoelectric material (10) deposited on at least a part (6) of the body, and of a thin metallic layer (11) deposited on the piezoelectric layer (10) so as to form an electrode.Type: GrantFiled: March 12, 1997Date of Patent: January 5, 1999Assignee: Centre Electronique Horloger S.A.Inventor: Jean Hermann
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Patent number: 5551294Abstract: A micromachined measuring cell is adapted to be mounted on a support and has a measuring sensor (121) and an assembly structure (120) distinct from one another and associated with each other by a connecting arm (128). At least one part element (103b) of the assembly structure, one part (133) of the connecting arm and one part (103a) of the sensor (121) are produced as one single piece. The assembly structure (120) of this measuring cell is preferably in the shape of a frame surrounding the sensor (121).Type: GrantFiled: January 27, 1995Date of Patent: September 3, 1996Assignee: CSEM-Centre Suisse D'Electronique et de MicrotechniqueInventor: Jean Hermann
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Patent number: 5196758Abstract: A piezoelectric resonator containing two rectangular parallelepipedal slices including N and M base structures, respectively, wherein N and M are integers. The two rectangular parallelepipedal slices each include at least one base structure shaped as a thin crystal slice of piezoelectric material in the form of a rectangular parallelepiped. A non-resonant arm connects the two rectangular parallelepipedal slices in juxtaposition in a single plane. An embedding zone is connected to the arm through a connection zone so as to fix the resonator outside a center thereof. Electrodes are disposed on opposite surfaces of the two rectangular parallelepipedal slices and are polarized to excite preferentially the Nth harmonic of a fundamental contour vibration mode in each base structure, and to produce respective extension modes in the two rectangular parallelepipedal slices in a direction perpendicular to an axis of the non-resonant arm.Type: GrantFiled: March 8, 1991Date of Patent: March 23, 1993Assignee: Centre Suisse d'Electronique et de Microtechnique S.A.Inventor: Jean Hermann
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Patent number: 4926086Abstract: A piezoelectric resonator formed as a thin parallelepipedic quartz plate whose width is arranged along the electric axis X of the crystal, the length along an axis Y' and the thickness along an axis Z', wherein the axes Y' and Z' form an angle approximately equal to 24.degree. with the mechanical axis Y and the optical axis Z of the crystal, respectively, and the ratio w/l of its width to its length is approximately equal to 0.64.Type: GrantFiled: June 30, 1989Date of Patent: May 15, 1990Assignee: Centre Suisse D'Electronique Et De Microtechnique S.A.Inventors: Claude Bourgeois, Jean Hermann
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Patent number: 4503353Abstract: Axes X', Y' and Z' of a resonator are established from the axes X, Y and Z of a quartz crystal by virtue of two rotational movements through angles .phi. and .theta., respectively. The resonator is energized to vibrate in accordance with the fundamental torsional mode. The angles of cut .phi. and .theta. are such that the first-order temperature coefficient is zero. The torsional mode may be coupled to a flexural mode in order to render the second-order temperature coefficient zero. The fork tines extend in the X' direction. In other embodiments the tines extend in the Y' direction and the rotation .phi. and .theta. are about the X and Z' axes, respectively.Type: GrantFiled: July 11, 1983Date of Patent: March 5, 1985Assignee: Centre Electronique Horloger S.A.Inventor: Jean Hermann
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Patent number: 4450378Abstract: A ZT-cut quartz crystal resonator comprises two thin rectangular plates connected together by at least one resonant arm which itself is connected to a support zone by a linking bar. A pair of electrodes is provided on the quartz resonator for receiving alternating electrical signals of opposite polarity for effecting in-phase contour-mode vibration of the plates while making the arms to vibrate in opposite phase to the plates.Type: GrantFiled: January 25, 1983Date of Patent: May 22, 1984Assignee: Centre Electronique Horloger S.A.Inventors: Jean Hermann, Claude Bourgeois
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Patent number: 4313071Abstract: The resonator according to the invention comprises at least one quartz crystal in the form of a rectangular thin plate, of which the length l is directed along an axis X', the width w along an axis Y' and the thickness t along an axis Z', and which vibrates in a contour mode. The axis Z' is situated in the plane of the electrical axis X and optical axis Z of the crystal and forms with the axis Z an angle .phi. such that16.degree.<.phi.<36.degree.and the axis Y' forms with the mechanical axis Y of the crystal an angle .theta. such that10.degree.<.theta.<30.degree.This resonator presents a zero temperature coefficient of the first order and is not dependent to any critical extent on the dimensional ratio between the sides w and l of the plate; the temperature coefficients of higher order are very small. The piezo-electric coupling is such that the optimized mode of oscillation is the only one excited in practice.Type: GrantFiled: September 7, 1979Date of Patent: January 26, 1982Assignee: Centre Electronique Horloger S.A.Inventors: Jean Hermann, Claude Bourgeois
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Patent number: 4126802Abstract: The invention relates to piezoelectric resonators, and more particularly to piezoelectric resonators comprising a DT- or CT-cut quartz plate vibrating torsionally about its longitudinal axis which is the electrical axis X of the quartz crystal. The width of the plate b, extending along the Z'-axis, and its thickness h extending along the Y'-axis are linked by the relation1<b/h<10In proportion to its size, the resonator has a low resonance frequency, the temperature coefficient of the first order of which is nil and the temperature coefficient of the second order of which is very low.Type: GrantFiled: January 11, 1977Date of Patent: November 21, 1978Assignee: Centre Electronique Horloger, S.A.Inventor: Jean Hermann
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Patent number: 4065684Abstract: A piezoelectric resonator, particularly for electronic wrist watches, comprises an elongated piezoelectric crystal rod that oscillates in length-extension. Opposite faces of the rod are partially metallized; and short wires are secured tangentially to these metallized surfaces midway of the length of the rod. The wires extend perpendicular to the length of the rod and are secured at their other ends to metallized opposite surfaces of an elongated ceramic support which is parallel to and of about the same size and shape as the rod. The support also has metallized end faces which are secured to the inner ends of support wires that pass through a casing in sealed relationship and mount the support and rod in spaced relation from the casing.Type: GrantFiled: August 4, 1975Date of Patent: December 27, 1977Assignee: Centre Electronique Horloger S.A.Inventors: Jean Hermann, Hubert Choffat