Sanyo EP92H - Manual (Page 12)

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Direct conversion technology adopted
→ No SAW filter is required, making
further miniaturization possible
Diversity synthesis technology adopted
→ Makes stable reception possible
Frequency conversion (LA8101) ODFM demodulation LSI (LC74112)
UHF Ant.
LNA
LNA
LPF
LPF
LPF
LPF A/D
A/D OFDM
demodulator
MPEG-TS
output
A/D
A/D
OSC PLL
π /2
π /2
Deinterleave
E
F
C
Due to the adoption of direct conversion technology
This approach achieves antenna diversity,
which is effective at improving reception performance.
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.
Terrestrial Digital One-Segment Chipset NTSC/PAL Video Encoder
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.
● No output coupling capacitors required
● Low-voltage drive (2.7 to 3.6 V)
● Voltage sag does not occur
● Built-in sixth-order low-pass filter (fc = 7.5 MHz)
● Standby mode power consumption: 0 µ A
● The amplifier gain can be selected (6, 9, or 12 dB)
Video driver
New
product
LA73074CL
6 7 8 4
10
9
1
5
3
2
Minus Voltage
Generator
from
DAC V_IN
A-GND
V CC _N P_SAV_CTL
V CC
V_OUT
75 Ω
GAIN_CTL
CLAMP
Video
Driver
Power
Save
LPF AMP
GND
CLK_OUT ND1
Low: 6dB
High: 9dB
Open: 12dB
Low: Active
High: Stanby
Open: Stanby
Cell Phone Video Drivers
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).
LCD
LC822961
LC822971
LC822961
equivalent
Memory
Flash
memory
Frame
memory
Application
processor Baseband
processor
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
LC822961
SDRAM
controller
16-Mbit SDRAM (MCP) PLL CLK
CTL bus
Composite
video output
Data
CPU I/F
DRAM
writer
Timing
generator
NTSC/PAL
video encoder
D/A converter and
75 Ω driver
H/V filter
H/V ccalar
Display writer
SEL
VGA
Size
(5 Mbits)
DAC
Converts base band processor generated video and provides other functions for TV output.
● Miniature package (CSP42: 3.3 × 3.78 mm 2 )
● 10-bit D/A converter with built-in 75 Ω 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
Under
development
LC822971
NTSC/PAL Encoder
LC822961
New
product
LC822963