U2794 TEMIC Semiconductors, U2794 Datasheet - Page 10

• Manufacturer Part Number: U2794
• Description: 1000 MHz Quadrature Demodulator
• Manufacturer: TEMIC Semiconductors

Description of Evaluation Board
Board material:
The board offers the following functions
D
– The supply voltage and the control inputs GC, PC and
– The outputs I, IX, Q, QX are dc coupled via an plug
– Also the offsets of both channels can be adjusted with
Dimensions in mm
Package: SSO 20
U2794B
10 (11)
PD are connected via a plug strip. The control input
voltages can be generated via external potentiome-
ters; then the inputs should be ac–grounded (time
requirements in burst–mode for power up have to be
strip or can be ac-connected via SMB plugs for high
frequency tests e.g. noise figure or s-parameter mea-
surement. The pins II, IIX, QQ, QQX allow user
definable filtering with 2 external capacitors CII,
The test circuit for the U2794B:
considered).
CQQ.
two potis or resistors.
transmission lines: Z
epoxy;
å
r = 4.8, thickness = 0.5 mm
O
= 50
W
– The LO- and the RF-inputs are ac–coupled and
– The complementary RF-input is ac-coupled to GND
D
D
connected via SMB plugs. If transmission line T3 is
connected to the RF-input and ac-grounded at the
other end, gain and noise performance can be
(CRFX = 1 nF), the same appears to the complemen-
s-parameter analyzer directly to the in- and output-
outputs, two OP’s (e.g., AD620 or other) can be con-
figured with programmable gain; together with an
output-divider network RD = 450
direct measurements with 50
improved (input matching to 50
tary LO-input (CNLO = 1 nF).
A calibration part, which allows to calibrate an
signal ports of the U2794B.
For single-ended measurements at the demodulator
possible at frequencies
94 8872
TELEFUNKEN Semiconductors
t
100 kHz.
W
W
load-impedances are
Rev. A3: 23.08.1995
).
W
to RL = 50
W
,