摘要:
An in-line surface-wave reflector filter having an input/output transducer system (2, 12/4) in which direct acoustic signal transmission between input and output is eliminated.
摘要:
An interdigital converter of a surface acoustic wave filter is internally protected against electrostatic discharges. The protection is provided by a resistor which is connected in parallel to the interdigital converter.
摘要:
A weighted reflector which has relatively low sensitivity to production-dependent tolerances. The reflector is based on the principle of an open-short reflector which has length-weighted reflector strips.
摘要:
A surface-wave filter in which the acoustic wavepath is reflected in order to reduce the substrate size necessary. The reflections are chosen so that interference due to temperature effects is excluded. The use of filters of this kind as partial filters in a combined filter enables cross-talk to be further reduced.
摘要:
A surface acoustic wave filter has one or more acoustic filter tracks. Each track has an input interdigital converter, an output interdigital converter, and a reflector. The reflector reflects surface waves between the input and output inter-digital converter by 180.degree.. The reflector is formed with a multiplicity of reflector electrode fingers which are combined into reflector finger groups. Mutually adjacent reflector finger groups are spaced apart by a defined spacing distance such that respective signals in adjacent reflector finger groups are superimposed in antiphase.
摘要:
An interdigital transducer is weighted by means of finger-width weighting for surface wave arrangements. The weighting is produced by differing finger widths in conjunction with constant widths of finger gaps. Constant finger overlap length is preferably provided.
摘要:
The surface acoustic wave (SAW) filter has two or more identical acoustic tracks. The input side of the tracks is electrically connected in parallel and the output side is electrically connected in series, whereby the impedance of input side of the SAW filter is reduced relative to the impedance of the individual acoustic tracks.
摘要:
Magnetic head comprising two magnetic circuits (1, 1') attached to each other. Two parts (14, 14') made of non-magnetic material are located beneath the gap of the head. The magnetic poles 3, 3' are made with thin layers on the magnetic circuits (1, 1') and the parts made of non-magnetic material. The material for bonding the magnetic circuits sets up the gap (5) between the poles (3, 3').
摘要:
A magnetic head employs a gap of magnetic material between two poles. The magnetic material of the gap has a saturation value less than the saturation value of the poles. When the gap material is not saturated, the magnetic field remains contained within this gap.
摘要:
The electronic component, specifically a SAW component with conductive structures disposed on a substrate is encapsulated for protection against environmental influences. The electrically conductive structures are sealed with a gas diffusion-constricting protective layer formed with an electrochemical or ion bombardment process.