摘要:
This invention is applied to dual mode provided receiver capable of coinciding with both TDMA system and the non-TDMA system so as to provide a DC offset cancel circuit preferable for each communication method having a compact structure. In case where a predetermined time slot is allocated as an offset quantity detection time in the TDMA system, a first feedback loop is activated and corresponding to detection signals corresponding to differential output signals OUT, XOUT by a comparator 2, a detection result is updated in the holding section 3 according to a strobe signal STB and held therein. Output signals from the holding section 3 are fed back to an amplifier 1 through a selection section 5 and a DC offset is cancelled out. In case where the offset quantity is detected successively, a second feedback loop is activated and then, detection signals from the comparator 2 are identified by a filter section 4, and fed back to the amplifier 1 through the selection portion 5, so that the DC offset is cancelled out.
摘要:
A magnetic recording medium is disclosed, comprising a support having provided thereon a substantially nonmagnetic lower layer by coating a lower layer coating solution comprising a nonmagnetic powder dispersed in a binder and drying, and a layer having a thickness of from 0.01 to 0.15 μm by coating a magnetic layer coating solution comprising a ferromagnetic metal powder or a hexagonal ferrite powder dispersed in a binder, wherein the magnetic layer contains diamond particles having an average particle size of from 1/5 to 2 times the thickness of the magnetic layer in an amount of from 0.1 to 5.0 mass % based on the ferromagnetic metal powder.
摘要:
A magnetic recording and reproduction method comprising recording or reproducing a track of a rotating magnetic disk by means of a magnetic head, wherein the magnetic disk comprises a support and a magnetic layer containing ferromagnetic powder and a binder; the track has a breadth of 2 μm or less; and a frictional force between the magnetic layer and the magnetic head at innermost peripheral area of a recording region of the magnetic disk is 30 mN or less, a frictional force between the magnetic layer and a magnetic head at outermost peripheral area of a recording region of the magnetic disk is 20 mN or less, and a ratio of the frictional force at the innermost peripheral area to the frictional force at the outermost peripheral area is from 1.0 to 4.0.
摘要:
A magnetic recording medium comprising: a nonmagnetic support; and at least one magnetic layer comprising a ferromagnetic hexagonal ferrite powder and a binder, wherein the magnetic layer comprises diamond particles having an average particle size of 0.03 to 0.5 &mgr;m in a ratio of 0.1 to 5% by weight to the ferromagnetic hexagonal ferrite powder, the ferrite hexagonal ferrite powder has an average tabular diameter of 5 to 40 nm, and the binder is at least one of: (i) a binder comprising from 0.2 to 0.7 meq/g of at least one polar group selected from —SO3M, —OSO3M, —PO(OM)2, —OPO(OM)2 and —COOM, wherein M represents a hydrogen atom, an alkali metal or ammonium, and (ii) a binder comprising from 0.5 to 5 meq/g of at least one polar group selected from —CONR1R2, —NR1R2 and —N+R1R2R3 wherein R1, R2 and R3 each independently represents a hydrogen atom or an alkyl group.
摘要:
A method for producing a magnetic recording medium comprising: dispersing at least a binder and a ferromagnetic hexagonal ferrite powder to prepare a magnetic coating; and applying the magnetic coating to provide at least one magnetic layer, wherein the binder is at least one of: (a) a binder comprising 0.2 to 0.7 meq/g of at least one polar group selected from —SO3M, —OSO3M, —PO(OM)2, —OPO(OM)2 and —COOM wherein M represents a hydrogen atom, an alkali metal or ammonium; and (b) a binder comprising 0.5 to 5 meq/g of at least one polar group selected from —CONR1R2, —NR1R2 and —N+R1R2R3 wherein R1, R2 and R3 each independently represents a hydrogen atom or an alkyl group, and the ferromagnetic hexagonal ferrite powder has an average tabular diameter of from 10 to 40 nm and a water content of from 0.3 to 3% by weight.
摘要:
An apparatus for controlling an ignition timing of an engine is capable of reducing or preventing occurrences of backfires. The apparatus includes a no-load deceleration state detector for detecting that an engine is in a no-load deceleration state. An engine speed detector detects an engine speed. An advanced timing setting unit sets an advanced ignition timing (retard amount) in situations where the occurrence of backfires are likely, such as during the no-load deceleration state. A converter 105 determines an ignition angle &thgr;ig on the basis of an output pulse of a pulse generator and an advance amount provided by the advanced ignition timing setting unit.
摘要:
A magnetic disk for high-density recording is provided, wherein a substantially non-magnetic lower layer is formed on a support and a magnetic layer containing ferromagnetic powder dispersed in a binder is formed on the lower layer. The magnetic layer has a thickness of 0.02 to 0.5 &mgr;m, and on the surface thereof at least 1×104 projections standing at least 20 nm high and at most 1×103 projections standing at least 70 nm high per mm2 measured by an atomic force microscope.
摘要:
A rubber fixing-roller includes a core and a non-foamed rubber elastic layer provided on the periphery of the core, the elastic layer including a peripheral surface having a predetermined outside diameter, the elastic layer being prepared in a predetermined heat capacity per unit volume by mixing a filler having low density and low specific heat.
摘要:
A semiconductor device having multiple circuit elements capable of performing different functions and that operate at a high frequency includes island regions on which the circuit elements are located and isolation regions that surround the island regions and thus, the circuit elements. The island regions electrically separate the circuit elements from each other. A capacitor is connected between a substrate portion of the semiconductor device and ground. The isolation regions include a conductive region with a conductivity type opposite to the conductivity type of the substrate portion, such that a parasitic capacitor is formed between the substrate portion and the conductive region. The parasitic capacitor prevents signal leakage between the circuit elements and the island regions.
摘要:
A magnetic recording medium is disclosed, comprising a non-magnetic support having provided thereon at least a lower non-magnetic layer comprising a binder having dispersed therein a non-magnetic powder and an upper magnetic layer comprising a binder having dispersed therein a ferromagnetic powder which has been coated on said lower non-magnetic layer while the lower non-magnetic layer is wet, wherein the upper magnetic layer has an average dry thickness (d) of not more than 1.0 .mu.m and an average thickness variation (.sup..DELTA. d) at the interface between the upper magnetic layer and lower non-magnetic layer is not more than d/2. The magnetic recording medium exhibits excellent electromagnetic characteristics, running properties, and durability.