Ordering number : END. Monolithic Linear IC. Dual Operational Amplifiers. The LA is a high-performance dual operational amplifier that can operate from a single voltage power supply. It features a built-in phase correction circuit.
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Manual zz. Canada Contents 1. Should any component designated by a symbol need to be replaced, use only the part designated in the Parts List. Do not deviate from the resistance, wattage, and voltage ratings shown. The adjustment other than those specified herein may result in hazardous radiation exposure. Replace only with the same or equivalent type recommended by the manufacturer.
NOTE : 1. Parts order must contain model number, part number, and description. Substitute parts may be supplied as the service parts. Design and specification are subject to change without notice. SM 1. A laser pulse magnetic field modulation recording method and CAD-type ultra-high magnetic resolution method have been used to record data at a track pitch of 0.
In order to play back the extremely small marks which have been recorded using laser pulse magnetic field modulation, the iD Photo disc uses a ultra-high magnetic resolution method which incorporates CAD Center Aperture Detection. Ultra-high magnetic resolution is a form of technology in which a magnetic signal taken from only the center of the spot is extracted for playback.
The iD Photo disc has a multi-layered structure which comprises a polycarbonate substrate, upon which is the playback layer with magnetic characteristics, a recording layer which stores the data, and finally a heat dispersion layer which rapidly allows the spot which has been heated by the laser beam to cool. This playback layer functions as a screen to shield the recording layer on which the data is recorded from the laser beam, so that only a 0.
Moreover, in general the spacing between the tracks is narrow and so signal interference from tracks which are next to the track being read can occur. However, CAD-type ultra- high magnetic resolution also solves this interference problem. With CAD-type ultra-high magnetic resolution, only the magnetic signal which passes throught the window at the center of the beam spot is read, so that the playback reading area can be restricted to a very narrow area not only in the tracking direction, but also in the transverse direction.
As a result, signal interference is suppressed, and the spacing between the tracks can also be made smaller. During recording, a mark with a diameter of 0. This recording method involves firstly a magnetic head which applies a magnetic field which is modulated in accordance with the data supplied externally which is to be recorded.
In this state, the laser beam is directed to the reverse side of the disc. The radiated light within an 0. The data is then recorded by means of the resulting change in the magnetic polarity of the recording layer. The recording mark which is made by this pulse-type laser beam is accurately formed in the track at a diameter of 0.
The rotation of the disc causes each recording mark to overlap the preceding mark at a point 0. As a result, the circles formed according to the state of the laser beam move along and leaves a continuous series of minute crescent-shaped marks 0.
These marks are approximately one-quarter the size of the recording marks which are made on other media such as CDs and MOs. The iD Photo disc is a magneto-optical disc which records data uses the principle of applying magnetism and temperature sumultaneously so that the recording medium can maintain its magnetic polarity. Because of this, the data cannnot be erased simply by placing the disc within a magnetic field, and moreover the recording method does not result in any changes to the physical nature of the disc.
This means that stable characteristics can be maintained for respected disc writing operations. Because this window has a diameter of 0. With the iD Photo disc, PRML signal processing has been adopted as the signal processing method for this readable area. PRML signal processing compares the signal wave pattern which is detected when recording marks with several different pattern types pass by the window with the signal wave pattern which is actually obtained by the pickup in order to recreate the data which has actually been recorded.
This technology makes it possible to accurately reproduce the recording marks which are smaller than the window being used to read them, and if a signal pattern which is not valid is read, then it is handled as an error. In this way, recording and playback of data at high densities can be couple with high data reliability. The ZCLV method increases the disc rotation speed on a zone basis in accordance with the progression toward the center of the disc as the speed of rotation of the disc recording surface with respect to the pickup becomes progressively slower.
The iD Photo disc is devided into 12 bands from the outside to the inside of the disc surface, and the rotation speed within each band is varied within a range of rpm in order to maintain the speed of rotation of the recording surface with respect to the pickup to a level of about 5 meters per second. With conventional methods, the clock pulse is generated based on changes in the data being read.
However, with this external clock method, an FCM Fine Clock Mark signal is created beforehand and recorded onto the disc for use as a reference signal in order to generate the clock pulse. The timing of this FCM signal is monitored during reading of data in order to control the oscillation frequency of the clock signal generator in accordance with the rotation of the disc.
The Fine Clock Mark is engraved accurately onto the disc when the disc is manufactured, and it can then be used as an accurate reference for stable reading and writing. This is turn determines the direction of the magnetic field applied to the magnetic head. Also an upper limit is decided so that a magnetic field level may not be bigger at the amplitude limitation circuit by the data.
This controls the focus actuator of the pickup in order to carry out surface runout tracking control. They are amplifier part for the focus servo and the tracking servo. The signal level is set to 2.
This controls the tracking actuator and the thread actuator of the pickup in order to carry out rotation offset tracking control. Balance adjustment of main PP and sub PP This measures the DC offset when shifting to the inside and to the outside occurs, with respect to the center of the TE signal when the actuator is shifted 0. This is used as the external clock reference to generate the signal which becomes the syncronizing standard for the drive circuit board.
The above circuits adjust the signals so that the FCM amplitude is at about the same level when at the default recording and playback power. The frequency of the reproduced clock is 20 MHz. Peak hold for FCM signal and bottom hold circuit These circuits use the amplitude modulation of the FCM signal to hold the peak level and the bottom level of the FCM signal at the capacity which is connected to the transistor emitter.
During recording, there is the possibility that the WCLK 20 MHz or other high-frequency interference can become mixed in with 2. As a result, the maximum amplitude of the address signal is detected and the control potential of the VCA IC is changed so that the amplitude of the address signal can be changed to the appropriate level. Furthermore, it is input to the comparator IC to generate the address signal. Gain-Amplifier x 8.
This has the effect of canceling any fluctuations in characteristics resulting from the semiconductor laser temparature, and any variances in production lots, so that the laser power can be maintained at a stable level.
The spindle motor is used three aspect sensorless motor DC motor. Superimposing high-frequency currents When a high-output semiconductor laser is used, interference can be generated from the light which is reflected back from the disc. Because of this, high-frequency currents of MHz are superimposed on the laser drive currnet to reduce interference.
C Gain Adrs G. Accodingly, the rotation becomes faster as tracking moves toward the center of the disc. The electric charges sent to the final stage of the horizontal CCD are transferred to the floating diffusion, as shown in Fig.
RG is turned on by the timing in 1 , and the floating diffusion is charged to the potential of PD. The RG is turned off by the timing in 2. In this condition, the floating diffusion is floated at high impedance. The H1 potential becomes shallow by the timing in 3 , and the electric charge now moves to the floating diffusion.
RG is then turned on again by the timing in 1 when the H1 potential becomes deep. Thus, the potential of the floating diffusion changes in proportion to the quantity of transferred electric charge, and becomes CCD output after being received by the source follower.
The equivalent circuit for the output circuit is shown in Fig. Direction of transfer H Register Voltage output Electric charge Floating diffusion gate is floated at a high impedance. C is charged equivalently Fig. Theory of Signal Extraction Operation 6. Lens drive block Circuit Description Scannning converter Interlace converter This circuit uses the function of a Mbit SDRAMs to convert the non-interlaced signal which is output from the CCD into an interlaced signal for the video monitor.
Sound buffer 1. Digital clamp circuit The optical black section of the CCD extracts pixel averaged values from the subsequent data to make the black level of the CCD output data uniform for each line.
The pixel averaged value for each line is taken as the sum of the value for the previous line multiplied by the coefficient k and the value for the current line multiplied by the coefficient 1-k. Audio memory 2. LCD monitor 3. This is the image display device which displays the image signals supplied from the LCD driver. The interface is RSC-compatible. Outline of Operation 5. Horizontal aperture circuit This circuit is used generate the aperture signal.
SIO Serial control This is the interface for the 4-bit microprocessor. Each pixel is interpolated from the surrounding data as being either R, G or B primary color data to produce R, G and B data.
At this time, correction of the lens distortion which is a characteristic of wide-angle lenses is carried out. And then it is written to iD photo disc. This is the timing generation circuit which generates the clocks vertical transfer clock and electronic shutter clock which drive the CCD. Because the LCD closes more as the difference in potential between the VCOM common polar voltage: fixed at DC and the R, G and B signals becomes greater, the display becomes darker; if the difference in potential is smaller, the element opens and the LCD become brighter.
Outline The oscillation frequency is kHz, and it has no voltage adjustment. IC CH1 is output. It is output CCD power supply 5. Feedback for 5.
LA6358NT Datasheet PDF
HA datasheet, cross reference, circuit and application notes in pdf format. They use the HAIC is key parts so small and build easily. Hi,Pozzo Thanks for your feedback. Figure 2 The PCB layout. I am sorry for my English. Previous Post TDA stereo amplifier circuit.
LA6358NT Amplifiers. Datasheet pdf. Equivalent
High-Performance Dual Operational Amplifiers