Isao Fukushima

One Chip Servo System LSI for Home VCR

The home VCR is steadily gaining world-wide popu- larity with its high performance and low cost, and now is considered one of the most important home electronic appliances. Since the VCR employs a large number of electronic components, it tends to be quite complicated. To avoid this complication as well as to improve its performance and reliability, its a must to simplify the circuits. The most effective way to achieve this is to reduce the number of components through extensive use of ICs in electronic circuits. Also this approach will be most effective for portable-type VCRs which must be of compact and light-weight design.

Hifi VCR System

Improvement of the sound quality for home VCRs has been strongly desired. As the tape velocity becomes smaller according to the high density recording, the conventional fixed sound head gives poor quality in S/N and frequency response. It is well known that the sound quality is greatly improved by recording the sound signal with rotary heads. Using this concept, FM sound multiplex recording system has been developed and standardized in the 8mm VCR system in March 1983. 1), 2)

Automatic Assembly Recording System for Helical Scan Type VTR

The Automatic Assembly Recording System which eliminates the disturbing noises and flickers shown in playback pictures at each head and/or end of recorded shots has been achieved by the following methods: 1) Short length of recorded tape is automatically rewinded when the pause button is depressed. 2) When the pause button is released, the tape starts running and tape speed is controlled to make the previously recorded vertical sync signal in phase to the vertical sync signal for another shot. 3) After both vertical sync signals are put in-phase to each other, the new recordings are started.

Four A/D LSIs for a portable VCR system

This paper will discuss a set of four bipolar A/D circuits for a hand-held VCR. Used are combinations of analog compatible I2L complementary Schottky transistor logic operated at 40MHz, polyimide multilayer interconnection and precision ion-implanted resistors.

A VCR servo IC with self-calibrating adaptive speed control

A single chip servo VLSI utilizing shallow grooved high density bipolar technology, based on multi-plateau epitaxy and triple layer wiring with thin film technology, will be reported. The IC control has 6k gates and 1000 analog components.

A Bi-MOS FET processor for VCR audio

This paper will describe a signal processor for VCR audio that combines Bi--MOS switched capacitor filters with a bipolar head amplifier which exhibits less than 2μV rms noise.

New Portable Video Cassette Recorder

At present, the consumer VCR which is most widely sold is the table type VCR which incorporates a TV tuner, the main function of which is to record TV programs. In order to increase the market penetration of VCRs we felt that it was critically important to develop an advanced portable VCR which can be used for outdoor recording together with a video camera as well as in the home. The main points considered when developing this portable VCR were: 1. better portability because of smaller size and lighter weight. 2. longer battery life because of lower power consumption. 3. easy operation combined with advanced functions. Bearing these points in mind, we developed a new portable VCR which is smaller, lighter and consumes less power when compared with conventional VCRs. At the start of development, we set the following design parameters: