|
|
PDF UTC1018 Data sheet ( Hoja de datos )
| Número de pieza | UTC1018 | |
| Descripción | FM IF SYSTEM | |
| Fabricantes | YOUWANG | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de UTC1018 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
|
No Preview Available !
UTC1018
LINEAR INTEGRATED CIRCUIT
FM IF SYSTEM FOR CAR RADIO
DESCRIPTION
The UTC1018 has versatile muting characteristics and allows
receiver designers to realize the muting performance according to
their design concept.
FUNCTIONS
* FM IF Amplifier/Limiter
* Quadrature Detector
* AFC Clamp
* AGC Drive
* AF Mute Amplifier
* Signal Meter Drive
* DC Level Detector
FEATURES
* Adjustable muting sensitivity
* Soft muting function
* Variable maximum muting attenuation (6dB~40dB)
* Variable muting slope with respect to input signal level
* High limiting sensitivity with muting off
* Good S/N ratio
* Clamped AFC output
* Delayed AGC output for front end circuit
* Recommended supply voltage: VCC =8V
* Operating supply voltage range: VCC =7.5V~16V
* Low distortion
* Good AMR
APPLICATION
* FM car stereo receiver
ZIP-16
ORDERING INFORMATION
Device
Package
UTC1018
ZIP-16
YOUWANG ELECTRONICS CO.LTD
1
2004.12.15 V1.0
Free Datasheet http://www.Datasheet4U.com
1 page  
UTC1018
LINEAR INTEGRATED CIRCUIT
FUNCTION DESCRIPTION
．1 Muting Characteristic
The muting operation is performed by an AF preamplifier, the gain of which varies continuously with control current,
and a muting drive output circuit which supplies the control current.
The gain of the AF preamplifier decreases with increasing gain control current applied to pin 6. However, the gain
does not decrease further when the control current reaches approximately 120 µA or greater. The lower limit of the
gain under this condition depends upon a resistor connected between pin 5 and GND, and the higher the resistance
the lower the gain (the higher the attenuation). Thus the maximum muting attenuation will be set by connecting the
resistor between pin 5 and GND.
．2 The muting drive output comes in three types:
1) Hole detector output which develops a voltage when C/N (carrier-to-noise ratio) lowers under weak signal input
conditions.
2) A reversed output of the signal strength indicating output (output at pin 15)
3) A bandwidth limited muting drive output which develops a voltage when the AFC output becomes higher than
±VBE during tuning-off operation.
All these outputs are led to an OR circuit and the processed output is developed at pin 14.
．3 The general method to adjust the muting circuit of the UTC1018 is: to set the signal input level required to
actuate the muting circuit with the R16-G, to adjust the slope of the curve for the muting attenuation vs. antenna
signal input with the R15-G, and to adjust the maximum muting attenuation (determined by setting the noise level at
no signal) with the R5-G. The slope of the curve for the muting attenuation vs. antenna signal input level can also be
adjusted by the resistor connected between pins 14 and 6 in addition to R15-G, however, selecting a resistor too
high does not allow the muting control current flowing into pin 6 to reach 120 µA even though the maximum muting
drive output (V14) is applied, namely the muting attenuation does not reach its maximum value. Accordingly a
recommended value of the resistor between pins 14 and 6 is about 22 kΩ.
YOUWANG ELECTRONICS CO.LTD
5
2004.12.15 V1.0
Free Datasheet http://www.Datasheet4U.com
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet UTC1018.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| UTC1018 | FM IF SYSTEM | YOUWANG |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |