Datenblatt-pdf.com


LA1235 Schematic ( PDF Datasheet ) - Sanyo Semicon Device

Teilenummer LA1235
Beschreibung FM IF System Applications
Hersteller Sanyo Semicon Device
Logo Sanyo Semicon Device Logo 




Gesamt 12 Seiten
LA1235 Datasheet, Funktion
Ordering number : EN873F
Monolithic Linear IC
LA1235
FM IF System Applications
Overview
Package Dimensions
The LA1235 is a high integrated IC developed for use in unit: mm
high S/N, low distortion FM IF system applications. This 3006B-DIP16
IC features S/N=88dB, distortion factor=0.015% and has
almost all functions required for FM tuner IF stage.
[LA1235]
The IF amplifier and limiter stage consist of 6 stages of
double ended differential amplifier having an excellent
AMR, and this stage is followd by the signal meter driver
which consists of 4 stages of level detector, thereby
creating extended linearity up to strong input. The FM
detector stage consists of a double balanced quadrature
detector to which a low frequency preamplifire and a
muting controller are attached. The muting drive stage
consists of an OR circuit for weak signal muting drive
SANYO: DIP16
output which detects signal intensity and detuning muting Functions
drive output which detects S curve DC output and enables
the prevention of noise at the time of weak signal and
detuning. Further, the weak signal muting drive output
circuit contains a Schmitt circuit having hysteresis and
enables the prevention of muting malfunction due to
amplitude component at the time of weak signal. The AFC
output and tuning meter drive stage is of current drive type
which makes it possible to adjust AFC sensitivity and
muting band width by means of an external resistor, and
the built-in tuning meter null (short) circuit foreces the
tuning meter to be [0] when th IF amplifier stops working.
• IF amplifier, Limiter.
• Quadrature detection.
• AF preamplifier.
• Signal intesity muting drive output.
• Detuning muting drive output.
• AF signal muting circuit.
• Signal meter drive output.
• AFC, tuning meter drive output.
• IF amplifier stop circuit.
• Tunig meter null circuit.
The IF amplifier stop circuit, being a circuit to stop the FM
IF amlifier at the time of AM reception, makes it possible
to decrease shock noise due to FM-AM receiving mode
switchover.
Features
• High S/N (88dB typ.).
• Low distortion (0.015% typ.).
• Weak signal muting dirve output having hysteresis.
• Tuning mete null (short) circuit.
• Signal meter dirve output having wide dynamic range.
• High limiting sensitivity.
• Built-in constant-voltage regulated circuit (Operating
voltage : 10 to 14V).
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
O2097HA (KT)/63095HA (KOTO) /O076AT/8044KI, TS/4241KI/3091KI No.873-1/12






LA1235 Datasheet, Funktion
Sample Printed Circuit Pattern
LA1235
(Cu-coated area 70×60mm2)
Equivalent Circuit Block Diagram and Sample Application Circuit
No.873-6/12

6 Page









LA1235 pdf, datenblatt
LA1235
No products described or contained herein are intended for use in surgical implants, life-support systems,
aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and
the like, the failure of which may directly or indirectly cause injury, death or property lose.
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates,
subsidiaries and distributors and all their officers and employees, jointly and severally, against any
and all claims and litigation and all damages, cost and expenses associated with such use:
Not impose any responsibilty for any fault or negligence which may be cited in any such claim or
litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of
their officers and employees jointly or severally.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guarant-
eed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees
are made or implied regarding its use or any infringements of intellectual property rights or other rights of
third parties.
This catalog provides information as of October, 1997. Specifications and information herein are subject
to change without notice.
No.873-12/12

12 Page





SeitenGesamt 12 Seiten
PDF Download[ LA1235 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
LA1230FM IF SystemSanyo Semiconductor
Sanyo Semiconductor
LA1230FM IFSanyo
Sanyo
LA1231FM IF SystemSanyo Semicon Device
Sanyo Semicon Device
LA1231NFM IF SystemSanyo Semicon Device
Sanyo Semicon Device
LA1235FM IF System ApplicationsSanyo Semicon Device
Sanyo Semicon Device

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche