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Terrestrial Digital One-Segment Chipset
Miniature reception modules with low power consumption that achieve stable reception under rapidly changing
conditions are required for cell phones and other portable terminals. SANYO has established independently
developed diversity synthesis technology and the industry's first direct conversion technology that together meet
these requirements.
LNA
Frequency conversion (LA8101)
/2
UHF Ant.
LNA
/2
PLL
OSC
Direct conversion technology adopted
No SAW filter is required, making
further miniaturization possible
Due to the adoption of direct conversion technology
Large external components such as a SAW filter are not required
Image cancellation using analog circuits is no longer required, and at the same
time as reducing the size of the circuit and the power consumption, circuit performance
does not degrade over time or due to temperature fluctuations.
This approach achieves antenna diversity,
which is effective at improving reception performance.
Cell Phone Video Drivers
Video driver
LA73074CL
No output coupling capacitors required
Low-voltage drive (2.7 to 3.6 V)
Voltage sag does not occur
V_IN
from
3
CLAMP
LPF
DAC
A-GND
1
Minus Voltage
Generator
GND
5
6
CLK_OUT
22
ODFM demodulation LSI (LC74112)
LPF
A/D
LPF
A/D
E
MPEG-TS
F
output
C
A/D
LPF
LPF
A/D
Diversity synthesis technology adopted
Makes stable reception possible
New
product
Built-in sixth-order low-pass filter (fc = 7.5 MHz)
Standby mode power consumption: 0 µA
The amplifier gain can be selected (6, 9, or 12 dB)
Low:
6dB
High:
9dB
V
GAIN_CTL
CC
Open: 12dB
2
10
V_OUT
Video
AMP
9
Driver
75
Power
Save
7
8
4
V
_N
ND1
CC
P_SAV_CTL
Low:
Active
High:
Stanby
Open: Stanby
NTSC/PAL Video Encoder
This IC makes it possible to display the cell phone's LCD screen contents or image data that was taken
with the camera and is stored in the camera's memory on a TV (video input).
Application
Baseband
processor
processor
LC822961
Memory
LC822971
Frame
equivalent
memory
Flash
memory
NTSC/PAL Encoder
LC822961
LC822963
Converts base band processor generated video and provides other functions for TV output.
2
Miniature package (CSP42: 3.3 × 3.78 mm
)
10-bit D/A converter with built-in 75Ω driver
Supports a wide variety of input data rates (ITU-R601/SQ)
The LC822963 is an MCP package version of the LC822961 audio operational amplifier (LA6358N).
Application examples: TV games, video players
NTSC/PAL Encoder with On-Chip DRAM
LC822971
Data written to memory can be continuously output to a TV without being sequentially updated using the internal
frame memory.
Once the data has been written it can be displayed with essentially no load on the microcontroller.
On-chip 16 Mbit SDRAM. Allows drawing by the CPU without concern for the TV display rate.
Rotation processing (at write), enlargement processing (at display)
The NTSC/PAL encoder block is the same as that in the LC822961.
Application examples: Photograph album shows, business presentation tools
16-Mbit SDRAM (MCP)
CLK
SEL
CTL bus
DRAM
writer
CPU I/F
Data
Timing
generator
LCD
LC822961
New
product
Under
development
PLL
SDRAM
VGA
controller
Size
D/A converter and
(5 Mbits)
75
driver
Composite
video output
DAC
H/V filter
NTSC/PAL
H/V ccalar
video encoder
Display writer
LC822961
23
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