Moteur de recherche de fiches techniques de composants électroniques
  French  ▼
ALLDATASHEET.FR

X  

CXA3225N Fiches technique(PDF) 8 Page - Sony Corporation

No de pièce CXA3225N
Description  All Band TV Tuner IC (VHF-CATV-UHF)
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  SONY [Sony Corporation]
Site Internet  http://www.sony.co.jp
Logo SONY - Sony Corporation

CXA3225N Fiches technique(HTML) 8 Page - Sony Corporation

Back Button CXA3225N Datasheet HTML 4Page - Sony Corporation CXA3225N Datasheet HTML 5Page - Sony Corporation CXA3225N Datasheet HTML 6Page - Sony Corporation CXA3225N Datasheet HTML 7Page - Sony Corporation CXA3225N Datasheet HTML 8Page - Sony Corporation CXA3225N Datasheet HTML 9Page - Sony Corporation CXA3225N Datasheet HTML 10Page - Sony Corporation CXA3225N Datasheet HTML 11Page - Sony Corporation CXA3225N Datasheet HTML 12Page - Sony Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 16 page
background image
—8—
CXA3225N
Description of Operation
(See the Electrical Characteristics Measurement Circuit.)
VHF oscillator circuit
This circuit is a differential amplifier-type oscillator circuit. Pin 13 is the output, Pin 11 is the input and Pin 12
is the GND.
Oscillation is performed by connecting an LC resonance circuit including a variable capacitance diode, to Pin
13 via coupled capacitance, inputting to Pin 11 with feedback capacitance, and applying positive feedback.
Note that if the capacitance across Pins 11 and 13 is too large, positive feedback may be applied via a
parasitic capacitance causing undesired stray oscillation. The resistor connected Pin 11 prevents the
parasitic oscillation.
VHF mixer circuit
The mixer circuit employs a double balanced mixer with little local oscillation signal leakage. The input
format is the base input type. Pin 7 is grounded and the RF signal is input to Pin 8. The RF signal is
converted to IF frequency by the signal supplied from the oscillator and then output to Pins 4 and 5. Pins 4
and 5 are open collectors, so the power must be supplied externally. The electric potential of Pins 4 and 5 at
this time must be DC 4.0 V or more.
UHF oscillator circuit
This oscillator circuit is designed so that two collector ground type Colpitts oscillators perform the differential
oscillation operation via an LC resonance circuit including a variable capacitance diode. The resonance
capacitors which configure the Colppits oscillator are connected between Pins 14 and 15, 15 and 16, 16 and 17.
The LC resonance circuit including the variable capacitance diode Di is connected between Pins 14 and 17.
UHF mixer circuit
This circuit employs a double balanced mixer like the VHF mixer circuit. The RF signal is input to Pins 9 and
10. There are two input methods; one is the symmetrical input where the signal is input to Pins 9 and 10
differentially and the other is the asymmetrical input where Pin 9 is grounded via a capacitor and the signal is
input to Pin 10.
Pins 4 and 5 are the mixer outputs. Pins 4 and 5 are open collectors, so the power must be supplied
externally. The electric potential of Pins 4 and 5 at this time must be DC 4.0 V or more.
IF amplifier circuit
The signals frequency converted by the mixer are output from Pins 4 and 5, and then they are input to the IF
input Pins 1 and 2 via the external tuned circuit. As the IF tuned circuit, the single-tuned circuit shown in the
Electrical Characteristics Measurement Circuit or double-tuned circuits can be connected. When used as the
single-tuned filter, be sure to connect it via the capacitor so that the DC voltage may not be applied to Pins 1
and 2.
The signal amplified by the IF amplifier is output with symmetrical or asymmetrical output format. Selecting
symmetrical or asymmetrical is performed at Pin 7. Asymmetrical output when Pin 7 is grounded via the
capacitor; symmetrical output when it is directly grounded. During symmetrical output, SAW filter direct
connection is possible and during asymmetrical output. During asymmetrical output, output is performed
from Pin 20, and during symmetrical output, output is performed from Pins 19 and 20. The output impedance
is approximately 30
Ω.
U/V switch circuit
UHF operation is chosen by applying voltage of 3 V or more to Pin 18, VHF operation for 0 V or open.


Numéro de pièce similaire - CXA3225N

FabricantNo de pièceFiches techniqueDescription
logo
Sony Corporation
CXA3221AN SONY-CXA3221AN Datasheet
126Kb / 8P
   RX Gain Control Amplifier
CXA3221N SONY-CXA3221N Datasheet
151Kb / 8P
   RX Gain Control Amplifier
CXA3222AN SONY-CXA3222AN Datasheet
126Kb / 8P
   TX Gain Control Amplifier
CXA3222N SONY-CXA3222N Datasheet
149Kb / 8P
   TX Gain Control Amplifier
More results

Description similaire - CXA3225N

FabricantNo de pièceFiches techniqueDescription
logo
Sony Corporation
CXA3025N SONY-CXA3025N Datasheet
233Kb / 12P
   All Band TV Tuner IC (VHF-CATV-UHF)
CXA3125N SONY-CXA3125N Datasheet
201Kb / 13P
   All Band TV Tuner IC (VHF-CATV-UHF)
CXA1695L SONY-CXA1695L Datasheet
166Kb / 10P
   All Band TV Tuner IC (VHF-CATV-UHF)
CXA1664M SONY-CXA1664M Datasheet
226Kb / 10P
   ALL BAND TV TUNER IC (VHF-CATV-UHF)
CXA1594L SONY-CXA1594L Datasheet
225Kb / 10P
   ALL BAND TV TUNER IC (VHF-CATV-UHF)
CXA3095N SONY-CXA3095N Datasheet
167Kb / 11P
   All Band TV Tuner IC (VHF-CATV-UHF)
CXA1665M SONY-CXA1665M Datasheet
230Kb / 10P
   All Band TV Tuner IC (VHF-CATV-UHF)
logo
ANADIGICS, Inc
ACD0900 ANADIGICS-ACD0900 Datasheet
132Kb / 12P
   VHF/UHF CATV/TV Tuner
ACD0900S3C ANADIGICS-ACD0900S3C Datasheet
252Kb / 4P
   VHF/UHF CATV/TV Tuner Downconverter
logo
Sony Corporation
CXA1165P SONY-CXA1165P Datasheet
381Kb / 12P
   CATV and VHF TV Tuner
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16


Fiches technique Télécharger

Go To PDF Page


Lien URL




Politique de confidentialité
ALLDATASHEET.FR
ALLDATASHEET vous a-t-il été utile ?  [ DONATE ] 

À propos de Alldatasheet   |   Publicité   |   Contactez-nous   |   Politique de confidentialité   |   Echange de liens   |   Fabricants
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com