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| 型號： | GC509MCRO |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁數(shù)： | 1/4頁 |
| 文件大?。?/td> | 144K |
| 代理商： | GC509MCRO |
GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. (905) 632-2996 fax: (905) 632-5946
Japan Branch: A-302, Miyamae Village, 2–10–42 Mi yamae, Suginami–ku, Tokyo 168, Japan tel. (03) 3334-7700 fax (03) 3247-8991
Class A Amplifier with
3 Independent Gain Blocks
GC509 DATA SHEET
Document No. 510 - 70 - 3
DESCRIPTION
The GC509 is a Class A amplifier utilizing Gennum’s proprietary
low voltage JFET technology. It consists of two single-
ended, low noise inverting gain blocks, a Class A output
stage, and an on-chip microphone decoupling resistor.
Blocks A and B typically have an open loop voltage gain of
56 dB, with the closed loop gain set by the ratio of the
feedback resistor to the source impedance. It is recommended
that the maximum closed loop gain be 20 dB lower than the
open loop gain. All blocks of the device are internally bias
compensated, preventing any DC current flow via external
feedback resistors. Without this compensation, audible
scratchiness would be present during changes in volume
control settings.
The output stage of the GC509 is a Class A current drive.
It has a fixed reference voltage of typically 55 mV at pin 8
of the device. The current that flows in the transducer is the
ratio of the 55 mV reference voltage and the on-chip emitter
resistor (R
E
). To increase the bias current in the transducer,
simply place an external R
E
resistor from pin 8 to ground,
thereby decreasing the equivalent emitter resistance and
increasing the current.
BLOCK DIAGRAM
All resistors in ohms, all capacitors in Farads unless otherwise
stated
C OUT
B IN
R
B OUT
V
E
B
GND
A OUT
A IN
V
MIC
C IN
1
4
2
10
9
21K
5
R
MIC
3
8
- A
- B
7
6
- C
R
E
FEATURES
145
μ
A typical current drain
low noise and distortion
1.0 to 5 VDC operating range
2 independent preamplifiers
Class A output stage
variable transducer current
4 k
microphone decoupling resistor
STANDARD PACKAGING
10 pin MICROpac
10 pin PLID
10 pin SLT
Chip (61 x 55 mils)
Au Bump
相關PDF資料 |
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|---|---|
| GC509MINI | Analog IC |
| GC509PLID | Analog IC |
| GC509SLT | Analog IC |
| GC514 | Tone/Volume/Balance Control |
| GC562 | GC562 - Telecoil Preamplifier |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| GC509MINI | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| GC509PLID | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| GC509SLT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| GC-50FF | 制造商:Unicom 功能描述:ADAPTER, FEMALE-FEMALE, Series:-, Connector Type:Adapter, Convert From Connector |
| GC50K-DIE | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ASIC |
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