Invention Grant
- Patent Title: Series resonant drive circuit for magnetic bubble memory
- Patent Title (中): 用于磁性气泡存储器的串联谐振驱动电路
-
Application No.: US416043Application Date: 1982-09-08
-
Publication No.: US4430729APublication Date: 1984-02-07
- Inventor: Takashi Toyooka , Hirokazu Aoki , Mamoru Sugie , Shigeru Yoshizawa
- Applicant: Takashi Toyooka , Hirokazu Aoki , Mamoru Sugie , Shigeru Yoshizawa
- Applicant Address: JPX Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JPX Tokyo
- Priority: JPX56-140977 19810909
- Main IPC: G11C11/14
- IPC: G11C11/14 ; G11C19/08
Abstract:
A series resonant drive circuit for a magnetic bubble memory includes X- and Y-coils arranged orthogonally to each other for generating a rotating magnetic field applied to a magnetic bubble memory chip, resonance capacitors each connected to a corresponding one of the X- and Y-coils for forming a series resonance circuit with the corresponding coil at a frequency of the rotating magnetic field, power supplies each connected to a corresponding one of the resonance circuits, and an inductance device connected in series with both of the resonance circuits and a capacitance device connected between the resonance circuits to compensate a mutual inductance due to the inductive coupling between the X- and Y-coils and a capacitance due to the capacitive coupling between the X- and Y-coils. Further, the temperature coefficient of the capacitance device is selected so that the temperature coefficients of the mutual inductance and capacitance between the coils can be compensated.
Public/Granted literature
- US6126932A Polymer bound carbodiimide coupling reagent Public/Granted day:2000-10-03
Information query