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GK509 の電気的特性と機能

GK509のメーカーはGennumです、この部品の機能は「Class A Amplifier」です。


製品の詳細 ( Datasheet PDF )

部品番号 GK509
部品説明 Class A Amplifier
メーカ Gennum
ロゴ Gennum ロゴ 




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GK509 Datasheet, GK509 PDF,ピン配置, 機能
Class A Amplifier with 2 DC Coupled
Gain Blocks & Schottky Diodes
GK509 DATA SHEET
FEATURES
100 µA typical current drain
low noise and distortion
1.0 to 5 VDC operating range
DC coupled stages
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Class A output stage
Schottky diodes for MPO control
variable transducer current
4 kmicrophone decoupling resistor
STANDARD PACKAGING
• 8 pin PLID®
• Chip ( 61 x 55 mils)
VMIC
5
RMIC
DESCRIPTION
The GK509 is a Class A amplifier utilizing Gennum’s
proprietary low voltage JFET technology. It consists of a
single-ended, low noise inverting gain block, a Class
A output stage, an on-chip microphone decoupling
resistor, and a pair of Schottky diodes for symmetrical
peak clipping.
Block A typically has 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 GK509 is a Class A current drive.
It has a fixed reference voltage of typically 30 mV at pin 2
of the device. The current that flows in the transducer is the
ratio of the 30 mV reference voltage and the on-chip
emitter resistor (RE). To increase the bias current in the
transducer, simply place an external RE resistor from pin 2
to ground, thereby decreasing the equivalent emitter resistance
and increasing the current.
The GK509 also contains a pair of Schottky diodes in the
feedback configuration of the output stage, which provides
approximately 12 dB of MPO control.
VB
6
MPO
7
21K
A IN
4
-A
-B
RE
B OUT
8
2 RE
31
A OUT
GND
All resistors in ohms, all capacitors in farads unless otherwise stated
Revision Date: January 2001
BLOCK DIAGRAM
Document No. 510 - 69 -06
GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 tel. +1 (905) 632-2996
Web Site: www.gennum.com E-mail: [email protected]

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GK509 pdf, ピン配列
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1.3 VDC
I AMP
5 RMIC
6
I TRANS
7
21K
V IN
CS a
1.0 b S1
RS
3.92K
4- A
-B
RE
31
1 kHz
RFA = 0
I P3 = 0µA
All resistors in ohms, all capacitors in farads unless otherwise stated.
8
2
RL = 0
S2
ab
Id
Fig. 1 Test Circuit
RMIC
5
BASE
CURRENT
COMPENSATION
6
7
21 K
8
3
4
2
RE
1
All resistors in ohms, all capacitors in farads unless otherwise stated.
Fig. 2 Functional Schematic
3
510 -69 - 06


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共有リンク

Link :


部品番号部品説明メーカ
GK504

Low Current Preamplifier

Gennum Corporation
Gennum Corporation
GK509

Class A Amplifier

Gennum
Gennum


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