NANOCARD LOGICAL MODULES (BNL) (Engineering Materials)

Technical Report · Thu Oct 31 04:00:00 EST 1963

OSTI ID:4725852

The nanocard moduies form a 100-Mc counting system used in experiments involving accelerators. Current switching logic, accomplished with transistors and germanium tunnel diodes, is used for high speed logic. All circuits have a rise time and time jitter of 2 nsec or less. The chief logical elements are pulse-height limiters, discriminators, multichannel coincidence circuit four-fold fanout, and a scale of eight. The fanout enables a limiter or discriminator output to drive any combination of 4 elements. Each element is a separate plug- in module. Elements are interconnected with 50-ohm cable on a 5-ma level with at least one terminal. All module inputs and outputs are compatible so that a discriminator can drive or be driven from a coincidence circuit. Modules will operate up to a continuous counting rate of 108 pulses per sec. Wide variations in random counting rates may be tolerated. The discriminators and the scaler have provisions for remote turnoff from auxiliary timing circuits. Exit from the high speed counting circuits to conventional scalers and logic circuits is by a 10-Mc regenerative puise-amplifier that delivers 19 v pulses into 100 ohms. (F.L.S.)

• Research Organization: Brookhaven National Lab., Upton, N.Y.) Page(s): v
• NSA Number: NSA-17-016470
• OSTI ID: 4725852
• Report Number(s): CAPE-943
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACCELERATORS
AMPLIFIERS
BACKGROUND
CIRCUITS
COINCIDENCE METHODS
COUNTERS
CURRENTS
DIGITAL SYSTEMS
ERRORS
FREQUENCY
INSTRUMENTS AND INSTRUMENTATION
SCALERS