公开(公告)号：DE2320482A1

公开(公告)日：1974-10-31

申请号：DE2320482

申请日：1973-04-21

Applicant: CRL ELECTRONIC BAUELEMENTE

Inventor： FINK RUDOLF DIPL ING

IPC: H01G4/12 ,  H01G4/38 ,  H01L29/00 ,  H01G3/09

公开(公告)号：CH538182A

公开(公告)日：1973-06-15

申请号：CH1334272

申请日：1972-09-12

Applicant: CRL ELECTRONIC BAUELEMENTE

Inventor： WEIDES ERICH DIPL ING

IPC: H01C1/12 ,  H01C9/02

公开(公告)号：DE2224490B1

公开(公告)日：1973-03-08

申请号：DE2224490D

申请日：1972-05-19

Applicant: CRL ELECTRONIC BAUELEMENTE GMBH, 8672 SELB

Inventor： BAUMANN, GEORG, 8672 SELB

IPC: C04B35/468 ,  H01B3/02 ,  H01G4/12 ,  H01B3/12

公开(公告)号：ES425505A1

公开(公告)日：1976-09-01

申请号：ES425505

申请日：1974-04-19

Applicant: CRL ELECTRONIC BAUELEMENTE

IPC: H01C17/242 ,  H01C17/245 ,  H01C

公开(公告)号：DE2341324A1

公开(公告)日：1975-02-20

申请号：DE2341324

申请日：1973-08-16

Applicant: CRL ELECTRONIC BAUELEMENTE

Inventor： DOLLWETZEL REINER DIPL-ING

IPC: H03H9/145 ,  H03H9/64 ,  H03H9/00

Abstract: A piezoelectric surface wave filter passes an amplified narrow frequency band and suppresses the undesirable sidebands without having to use differential lengths or widths of the comb electrode tines. This is achieved by arranging the axes of symmetry of the electrode systems on the piezoelectric carrier at a distance equal to an integral multiple of the wavelength of the main resonance frequency; the width of the comb tines is made smaller than one-quarter of that wavelength. The surface wave filter gives good performance but still is cheap to manufacture.

公开(公告)号：DE2333721A1

公开(公告)日：1975-01-23

申请号：DE2333721

申请日：1973-07-03

Applicant: CRL ELECTRONIC BAUELEMENTE

Inventor： DOLLWETZEL REINER DIPL-ING

IPC: H03H9/145 ,  H03H9/64 ,  H03H9/00

Abstract: The piezoelectric filter based on the principle of surface waves is formed with comb-shaped electrodes symmetrically arranged the piezoelectric substrate surface. The electrodes form two systems whose axes of symmetry are spaced in a specified manner related to the wavelength of the main resonance frequency and to a positive integer equal to or exceeding 100.

公开(公告)号：DE2228460A1

公开(公告)日：1973-12-20

申请号：DE2228460

申请日：1972-06-10

Applicant: CRL ELECTRONIC BAUELEMENTE

Inventor： RUMMEL WILHELM ,  SOELLNER WILLI

IPC: H01C1/084 ,  H05B3/40

公开(公告)号：DE1490226C3

公开(公告)日：1973-09-27

申请号：DE1490226

申请日：1963-07-27

Applicant: CRL ELECTRONIC BAUELEMENTE GMBH, 8500 NUERNBERG

Inventor： FORSTER, HELMUTH, DIPL.-PHYS., 8672 ERKERSREUTH

IPC: H01C1/02 ,  H01H85/046

公开(公告)号：FR2226733B1

公开(公告)日：1983-02-25

申请号：FR7413235

申请日：1974-04-16

Applicant: CRL ELECTRONIC BAUELEMENTE

IPC: H01C17/242 ,  H01C17/245 ,  H01C17/00 ,  H01C7/00

Abstract: 1449548 Resistors DRALORIC ELECTRONIC GmbH 18 Jan 1974 [19 April 1973] 02400/74 Heading H1S The resistance of a film 2 on a cylindrical ceramic body 1 is increased by removing portions 3, which are spaced along a helical path, with a pulsed laser. The laser is scanned longitudinally of the body 1 which is rotated at a speed which may be varied to obtain a desired pattern of the portions 3. The resistance of the film is preferably increased by a factor of between 1 and 10.

公开(公告)号：FR2267616A1

公开(公告)日：1975-11-07

申请号：FR7510971

申请日：1975-04-08

Applicant: CRL ELECTRONIC BAUELEMENTE

IPC: H01C17/23 ,  H01C10/06

Abstract: The trimmable resistor consists of a ceramic substrate onto which a number of spacially-parallel resistance paths are formed using either thin or thick film teqhniques. The different-valued resistance paths are electrically connected in series and each is short circuited by a zig-zag metal strip outside the resistor housing. The end contacts of the series-coupled resistance paths are led out to form terminals. By breaking the zig-zag metal strip at suitable points the total resistance value may be set as required. The metal strip may be broken with a pair of tweezers.