SKU: 97.1

Lot of 64 Ferrite-transistor cells is put up to auction

Ferrite-Transistor Module 1Ц3.088.017. Scans of main technical data and specifications, and circuit diagram are attached.

MANUFACTURER: plant “Uzhgorodpribor” in the city Uzhgorod(Ukraine)

PRODUCTION YEAR: 1979
TRANSISTOR TYPE: МП40A
CONDITION: New Old Stock

Please see pictures attached. There is yellow adhesive residue on the cases as a technological feature. One can see the internal structure of the FTC with ferrite ring on picture. Damaged cell is shown for illustration purpose
Ferrite-Transistor Cell:

a pulse component in devices used in automation and computer technology, comprising one or more ring-shaped, square loop ferrite cores combined with a transistor. The simplest type has a single core with the following: one or several write windings, one or several read windings, and an output winding, on which a readout signal appears when the core undergoes magnetic reversal. The transistor amplifies the signal and segregates the circuits in order to prevent the undesirable passage of signals in the reverse direction when several cells are connected in series. In the static state the transistor is blocked by a bias voltage. In writing, the signal in the output winding increases the transistor cut off; further, in reading, the signal in the output winding compensates the effect of the bias voltage, and the unblocked transistor amplifies the readout signal. Each cell is enclosed in an individual case to form an independent module.

Ferrite-transistor cells are free of many of the inherent drawbacks of ferrite-diode cells; they are simple and reliable, and they have good performance characteristics. However, their response speed is relatively low (~105 reversals per sec). In the1960’s, ferrite-transistor cells were used for logic elements (including elements for long-term memory) developed for specialized digital computers; they have also been used in automation equipment, such as frequency dividers and shift registers, and in remote control devices. However, complexity of manufacture has restricted the production rate, and the cells have been used infrequently since the appearance of integrated microcircuits.

A number of specialized military computers in the Soviet Union did not follow all the von Neumann principles of computer building. Commands memory and data memory were independent. This arrangement improves performance and eliminates coincidences associated with the programs (with the possibility of the emergence of viruses), simplified the tasks to protect against unauthorized actions. It turned out later that most specialized military computers created in the USSR were in line with the structure of "Risk" in modern terminology.