NF HSA42011, Instruction Manual

Page: 17 / 86

1.5 Principle of Operation
HSA42011 1-5
1.5 Principle of Operation
This product consists of preamplifier block, power amplifier block, and power supply block. "
Figure 1-1.
Block Diagram
" shows the block diagram of this product.
The preamplifier block is a wideband operational amplifier. It provides the gain tuning function, input
impedance switching function, two-input addition function, offset tuning function, and bias addition
function.
The power amplifier block performs power amplification and has protection functions.
The power supply block consists of the internal power supply block of this product, and the DC power
supply block for the power amplifier.
LINE
INPUT A
50 Ω
10k Ω
INPUT B
50 Ω
10k Ω
LINE
FILTER
DCPS
FIXED GAIN VAR GAIN
|
INVERT
ON
OFF
OFFSET
BIAS
POWER AMP
V METER
I METER
OUTPUT
FRONT
OUTPUT
REAR
MONITOR
VDD
SUB
PRE-AMP
Figure 1-1. Block Diagram