Functional Description; Rf Block Diagram - Nokia NSB-5 Series Technical Documentation Manual

NSB-5
System Module
Characteristics
Line regulation
Line regulation
Load regulation
Rise time (1% to 99%),
50mA, depends on load
voltage reference/bias
already ON, VR1 - VR7
Overshoot
Settling time (to 0.1% of
nominal), 50 mA, depends
on load, voltage refer-
ence/bias already ON
Phase margin
Total noise density
Short-circuit current.
Note: The chip does not
tolerate continuous
short-circuit current.
Supply current (each reg-
ulator)
NOTE 1: Characteristics above are NOT valid if VBAT < 3.0V .
NOTE 2: Line regulation is 20dB for f<100kHz when battery voltage is lower than 3.1V .
NOTE 3: The 220nF can be divided into two capacitors; one as close to CCONT as possible, the other
next to the RF parts.
NOTE 4: If the output current is less than 10mA, a 1uF is required to ensure stability.

Functional Description

RF Block Diagram

Refer to |4| which is the RF block diagram in Design Architect format. The related com-
ponent number is referenced to (..), so it is easier to locate that specific component.
As can been seen from the RF block diagram, most of the functions have been integrated
into three ASICs. CRFU_2a (N600) is a wideband UHF ASIC with both receiver and trans-
mitter functions.
The receiver functions include LNA and two downconversion mixers (Gilbert cell) with LO
buffers. The transmitter functions include an upconversion mixer (image rejection) with
LO buffer. All inputs/outputs are wideband and require external matching networks for
Page 54
Table 17: RF regulator specifications
Condition
F v 10kHz
F v 100kHz
o
T = 25 C
Turn-on
C = 1µF, turn on/off
C = 1µF, turn on from
CNTVRx rise
C = 1µF
output shorted to ground
ON mode
Nokia Mobile Phones Ltd.
PAMS Technical Documentation
Min Typ Max
49
40
0.6 1
6 70
3
6
45
200
250 350
I / I /
out out
60+330 10+540
Unit
dB
dB
mV/mA
ms
%
ms
o
nVrms/pHz
mA
mA
Issue 1 03/01