參數資料
型號: LA7790M
廠商: Sanyo Electric Co.,Ltd.
英文描述: QPSK Transmitter for Cable TV
中文描述: 調制變送器有線電視
文件頁數: 14/14頁
文件大?。?/td> 174K
代理商: LA7790M
PS No. 5689-14/14
LA7790M
7. Digital ECL Circuit
To get the correct 0°/90° phase switching signal for the modulator, a divide-by-four dual flip-flop is employed as
shown in the following figure.
Band Switch 1 can be usded to expand the range of the modulation frequency. Band Switch 2 can be used to select
the frequency to output to an external PLL.
This catalog provides information as of May, 1998. Specifications and information herein are subject to change
without notice.
I
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 loss.
I
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 responsibility 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.
I
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed 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.
OSC
L
90deg
to Mudulator
0deg
H
1/2
1/2
D
D
Q
Q
CL
1/2
1/2
H
Band
switch2
H/L
Band
switch
H/L
L
12
VCO
output
11
17
D
D
1/2
1/2
Q
Q
CL
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