Function and Waveform Generators
Function generators (FGs) are versatile waveform sources that generate a triangle-wave using switched current sources and capacitors. Their peaks are detected and used to control switching. A sine-shaper circuit converts triangle-waves to sine-waves. Three basic waveforms are output: triangle, sine, and square.
Waveform generators (WGs) are digitally-generated sources of waveforms. FGs are analog WGs. WGs use microcomputer or other digital circuitry to synthesize waveforms of various waveshapes. Waveform parameters can be set over the instrument range: frequency, duty ratio, amplitude, and offset.
|
WG200
Series |
FG201 |
FG202 |
FG203 |
WG225 |
|
Priority,
Step |
1, C2 |
2, C2 |
3, C1 |
4, C1 |
|
Frequency |
2 MHz |
10 MHz |
20 MHz |
25 MHz |
|
Trig/Gate
Proc. |
5 V
Logic |
BJT array |
Comparator
IC |
Comparator
IC |
|
TWG |
4007UB |
diff,
auto-pk-pk |
diff,
auto-sym, auto-pk-pk, ±IT |
sin-cos
inc gen, 15 ns PLD, 50 MHz clk |
|
Amplitude
Control |
Hysteresis
Cmpr |
|v|,
sync-avgr |
Pk det Þ
LPF |
μC
software |
|
Sine
Converter |
translinear |
translinear |
multitanh |
DAC |
|
VCF |
1.33 V/dec
inp |
1 V/dec
inp |
0V zs,
4 V fs |
0V zs,
4 V fs |
|
VCA |
0V zs,
4 V fs |
0V zs,
4 V fs |
0V zs,
4 V fs |
0V zs,
4 V fs |
|
VCD |
0V zs,
4 V fs |
0V zs,
4 V fs |
0V zs,
4 V fs |
0V zs,
4 V fs |
|
Sweep Gen. |
3
dec analog inc log |
μC-generated |
μC-generated |
μC-generated |
|
Level
Proc. |
LM13700
mpyr |
MC1496
4Q mpyr |
HFA3102
mpyr |
MC1496
4Q mpyr |
|
Output
Amplifier |
±40 V
open, 50 Ω, ±100 mA |
±10 V
open, 2-range,
50 Ω out; LM3181 |
±10 V
open, 50 Ω out refined
PG508 amplifier |
±10 V
open, 2-range, 50 Ω out; LM3181 |
|
μC |
ATtiny4313 |
ATmega8515 |
ATmega328 |
ATmega328 |
|
Front-Panel |
16-char
LCD, 4-sw +
digiknob |
16-char
LCD, 4-sw +
digiknob |
16-char
LCD, 4-sw +
digiknob |
16-char
LCD, 4-sw +
digiknob |
|
Notes |
min parts;
8-bit DACs |
|
PG
freq-driven |
|
