TEKTRONIX 370B/371A transistor curve tracer CURVE TRACER

The Tektronix 370B is a highly representative transistor curve tracer. The Tektronix 370B is a professional test instrument, and here are its detailed technical specifications:
Interactive programmable control — all interactive programmed measurements are performed via the distinctive front panel or GPIB.
The Tektronix 370B curve tracer provides supply capability up to 20 A/2000 V with measurement resolution down to 1 pA and 50 V. The Tektronix 370B meets the test requirements of many transistor products. The 370B performs DC parameter characterization on transistors, thyristors, diodes, SCRs, MOSFETs, optoelectronic devices, solar cells, solid-state displays, and other semiconductor devices.

Key features and performance:

• Maximum current — with the control set to 200 mA, STEP AMPLITUDE set to 20x, and STEP AMPLITUDE set to 10x.

• High-resolution DC parameter measurements on the 370B (resolution down to 1 pA or 2 µV)
  High-voltage and current sourcing on the 371B (up to 3,000 V or 400 A)
  Built-in cursor measurements — dot, window, and function lines
  Kelvin sensing
  Sweep measurement mode
  Waveform comparison and averaging
  Fully programmable
  1.44 MB floppy disk drive for storing curve setups and bitmaps
  Direct hard copy via third-party printers

Available peak power

16, 80, and 400 V ranges - 0.08, 0.4, 2, 10, 50, 220 W.

2,000 V range - 0.08, 0.4, 2, 10, 50 W.

Variable collector supply setting, expressed as a percentage of maximum peak voltage - 0 to 100%, in 0.1% increments.

Loop compensation (typical) range - at least 100 pF.

Step generator

Accuracy

Increment - 1.5%.

Absolute - less than 1.5% of total output + 3% x step amplitude setting + 1 mV or 1 nA.

Offset control range - varies between -10 and +10 times the step amplitude.

Resolution - step amplitude setting x 1%.

Current mode

Amplitude range -50 nA to 200 mA, in 1-2-5 sequence (21 steps).

Maximum current - at control setting of 200 mA, STEP AMPLITUDE set to 20x, STEP AMPLITUDE set to 10x.

Maximum voltage - at least 10 V.

Maximum reverse bias current - 10 times the step amplitude.

Maximum reverse voltage - less than 15V.

Ripple plus noise - less than 0.5% x step amplitude + 10 nA.

Voltage mode

Amplitude switch range - 50 mV to 2 V, in 1-2-5 sequence (every 6 steps).

Maximum voltage -20 times step amplitude.

Maximum current - at least 500 mA at 10 V or below, at least 200 mA at 15 V, at least 10 mA at 40 V.

Short-circuit current limit -500 mA, +50%, -20%.

Maximum reverse bias current - 10 times the step amplitude.

Maximum reverse current - less than 20 mA.

Ripple plus noise - less than 0.5% x step amplitude + 10 mV.

Step rate - 2x line frequency (1x line frequency in AC collector supply mode). Step occurs when collector voltage is 0.

Pulse step  -80 µs or 300 µs wide, ±10%.

Step and offset polarity - When " Step Generator Polarity Invert" is disabled, corresponds to collector supply polarity. When STEP GENERATOR POLARITY INVERT is selected or the CONFIGURATION switch is set to BASE COMMON, opposite to collector supply polarity. BASE COMMON configuration disables STEP GENERATOR POLARITY INVERT.

Number of steps - ranges from 0 to 10.

Auxiliary power supply:

Range  --40 to +40 V, step resolution 20 mV.

Accuracy (typical) -within 50 mV + 1.5% of total output.

Output current - at least 100 nA at ±20 V.

At least 10 mA at ±40 V.

Ripple plus noise - less than 50 mV p-p.

Vertical deflection system

Collector/Base current

Range - from 1 µA/div to 2 A/div in 1-2-5 sequence.

X10 MAG extends maximum sensitivity to 100 nA/div (1 nA resolution).

Accuracy (typical) - within 2% of WINDOW cursor reading + 0.1 x VERT/DIV setting.

Emitter current

Range - from 1 nA/div to 2 mA/div in 1-2-5 sequence. X10 MAG extends maximum sensitivity to 100 pA/div.

Accuracy (typical) - within 2% of WINDOW cursor reading + 0.1 x VERT/DIV setting + 1 nA.

Maximum displayed noise or ripple - depends on maximum peak voltage setting.