NIM Model 333

 Nanosecond Bipolar
 Dual Linear Amplifier

 * 2 ns risetime
 * Bipolar operation
 * Direct-coupled design
 * Variable, feedback-stabilized gain
 * Low time slewing
 * High stability
 * Rapid overload recovery
 * No baseline shift at high rates
 * Input protected to +/-100 volts
 

 

LRS Model 333 consists of two high-speed, direct-coupled bipolar pulse amplifiers in a single package. These amplifiers are especially suitable for applications in which wide variations in duty ratio and pulse amplitude are encountered, as well as for general- purpose use. They offer a unique combination of fast risetime, high gain, excellent overload characteristics (well protected input, low time slewing, and rapid recovery), and high output amplitude.

Each of the 333's two independent channels consists of a 4-pushbutton 50 Ohm attenuator followed by a basic direct-coupled, solid-state amplifier. Both input and output DC levels are at ground potential for easy interconnection with other direct-coupled circuits. Separate capacitively coupled AC outputs are provided for use when DC blocking is desired. Excellent linearity and stability are achieved through heavy feedback in an amplifier circuit of high inherent linearity and stability. A standard LRS input limiter provides substantial protection against damage from accidental overloads without sacrifice of direct coupling or amplifier performance.

The LRS Model 333 is a member of the LRS Innovator Line, an integrated series of high-speed logic instrumentation in which modern circuit design, components, and packaging are combined in instruments of unusually broad usefulness to experimental physicists in both high and low energy nuclear research.

SPECIFICATIONS

NIM Model 333 NANOSECOND BIPOLAR DUAL LINEAR AMPLIFIER
INPUT CHARACTERISTICS
Impedance: 50Ohm, constant to +/-100 V.
Input protection: Withstands pulse inputs to +/-100 V without damage; DC limited by 250 mW attenuator resistors.
Reflection coefficient: Less than 5% at input amplitudes up to +/-100 V.
Quiescent voltage: Ground.
OUTPUT CHARACTERISTICS
Impedance: Approximately 6Ohm.
Maximum amplitude: +/-2 volts.
Overshoot: Less than 10%.
Quiescent voltage: Ground.
GENERAL
Gain: 1 through 10 (0 to 20 db) in 2 db steps, non-inverting. Long-term stability +/-1 %. Gain tolerance +/-5%. Temperature dependence approximately 0.1%/'C.
Linearity: 2% integral.
Risetime: 1.8 to 2.2 ns., 10% to 90%. Variation with amplitude approximately 5%.
Delay: In linear range, 4.0 ns, const. (3.0 ns circuit delay, 1.0 ns internal cabling delay). Slewing approximately 0.5 ns at 10-fold overload, 1.0 ns at 30-fold overload, and 1.2 ns at 60-fold.
Overload recovery: Less than 2 ns for 20-fold overload.
Noise: Less than 50 microvolts rms, referred to input, total.
Bandwidth: Direct-coupled, 0 to 200 MHz; AC-coupled, 30 kHz to 200 MHz.
Packaging: AEC NIM #1 module; Lemo-type connectors.
Weight: Module, approximately 1 lb.
Power requirements: + 12 V at 200 mA;
-12 V at 100 mA;
+ 24 V at 50 mA;
-24 V at 150 mA.

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