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參數資料
| 型號： | LA7790M |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO24 |
| 封裝： | MFP-24 |
| 文件頁數： | 13/14頁 |
| 文件大小： | 174K |
| 代理商： | LA7790M |
1. Modulator
The modulator consists of two identical multiplier circuits, creating I and Q channels. Pins 4 & 5 and pins 8 & 9 are I
and Q channel inputs, respectively. These pins must be biased at 2.1 ± 0.2 V. Pin 6 is an internal 2.1 V bias. This
internal bias can be used if the I & Q data inputs are AC coupled, but an external bias must be used in the case of DC
coupled data inputs. Carrier suppression is improved if the offset voltages between pins 4 & 5 and pins 8 & 9 are
small.
(1) AC coupled application
(2) DC coupled application
No. 5689-8/14
LA7790M
4
+
I input
Q input
2.1 V
+
9
8
6
5
4
+
I input
2.1 V
Q input
+
9
8
6
5
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