The document provides a device modeling report for the programmable unijunction transistor part number U71, detailing parameters such as saturation current, forward transit time, and equivalent circuit characteristics. It includes specific simulation results for peak voltage and current, forward voltage characteristics, and pulse output specifications. Additionally, it outlines key evaluation circuits and performance metrics relevant to the component's functionality.

1. Device Modeling Report
COMPONENTS: Programmable Unijunction Transistor
PART NUMBER: U71
MANUFACTURER: NEC
Bee Technologies Inc.
All Right Reserved Copyright Bee Technologies Inc. 2005

2. Pspice model
Model description
parameter
IS Saturation Current
ISE Non-ideal Base-Emitter Diode Saturation Current
RC Series Collector Resistance
TR Reverse transit time
TF Forward Transit Time
Equivalent circuit
A
QP NP-D G
QNPN-D
K
All Right Reserved Copyright Bee Technologies Inc. 2005

3. Peak Voltage (Vp) and Peak Current (Ip) Characteristics
Peak voltage and current (Vp,Ip)
12V
(1.9890u,11.038)
Simulation
8V
Valley point (Min.peak)
4V Vv=0.493V, Iv=24.719uA
(24.719u,493.432m)
0V
0A 10uA 20uA 30uA 40uA 50uA
V(U1:A)
I_I1
Simulation Result
Vp=11.038(V) at Ip=1.989u(A)
SPEC: Vp=10.2(V) to 11.6(V) at Ip(max.)=2u(A)
Forward Voltage Characteristics
12V
11.038)
8V
Vf=1.000V at IF=50mA
4V
(50.000m,1.0002)
93.432m)
0V
0A 20mA 40mA 50mA
V(U1:A)
I_I1
Simulation Result
Vf=1.000(V) at If=50m(A)
SPEC: Vf=1.0(V)Typ. at If=50m(A)
All Right Reserved Copyright Bee Technologies Inc. 2005

4. Voltage and Current Characteristics Reference
Evaluation Circuit
RG
{Rp rg }
I1
VS
0 0
0
All Right Reserved Copyright Bee Technologies Inc. 2005

5. Pulse Output Voltage and Pulse Output Rise Time
12V
(1.1520u,9.1012)
(1.1444u,8.0816)
8V
4V
(1.0924u,887.755m) Tr=52ns
0V
0s 0.5us 1.0us 1.5us 2.0us 2.5us
V(OUT)
Time
Vo=9.1012(V) at Vi=20(V), Ct=0.2u(F)
SPEC: Vo=6(V)[min.] to 10(V)[typ.] at Vi=20(V), Ct=0.2u(F)
tr=52(ns) at Vi=20(V), Ct=0.2u(F)
SPEC: tr=50(ns)[typ.] to 80(ns)[max.] at Vi=20(V), Ct=0.2u(F)
Evaluation circuit
R5 R3
51 0k 16 k
V1
20 Vd c
0
OUT
R4
R6
C1 27 k
20
0.2 u
IC = 12 .91
0
All Right Reserved Copyright Bee Technologies Inc. 2005