100 MEGACYCLE COUNTING SYSTEM
A 100 Mc courting system is described for use with experiments at accelerators. Current switching logic using both transistors and germanium tunnel diodes is used for all high speed logic. All critical circuits have a rise time and time jitter of 2 nanoseconds or less. The logical elements are a pulse height limiter, a discriminator, a multichannel coincidence circuit, a four- fold fanout, and a scale of 8. The fan-out enables a limiter or discriminator output to drive any combination of four elements. Each element is a separate plug-in module. Elements are interconnected with 50 ohm cable at about a 5 ma level with at least one termination. Most module inputs and outputs are compatible so that, for example, a discriminator can either drive or be driven from a coincidence circuit. To insure reliable high speed operation and good time and temperature stability the transistors are operated at unity charge gain either in a current switching mode or in a linear mode in distributed amplifiers. Each tunnel diode provides a switching charge gain of from 2 to 5. Each module was designed for operation up to a continuous counting rate of 100 megapulses per second. Wide variations in random counting rate may be tolerated. (auth)
- Research Organization:
- Brookhaven National Lab., Upton, N.Y.
- NSA Number:
- NSA-15-019532
- OSTI ID:
- 4002401
- Report Number(s):
- BNL-5390
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- United States
- Language:
- English
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Charge controlled nanosecond logic circuitry
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ACCELERATORS
AMPLIFIERS
ANGULAR MOMENTUM
BETHE-SALPETER EQUATION
CABLES
CIRCUITS
COINCIDENCE METHODS
COUNTERS
ELEMENTARY PARTICLES
EQUATIONS
FEYNMAN DIAGRAM
FIELD THEORY
GERMANIUM
INTERACTIONS
MATHEMATICS
MOMENTUM
PERTURBATION THEORY
PLANNING
PULSES
QUANTUM MECHANICS
REGGE POLES
RELATIVITY THEORY
SCATTERING
SCATTERING AMPLITUDE
SEMICONDUCTORS
STATISTICS
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