GK504 Datasheet PDF - Gennum Corporation
| Part Number | GK504 | |
| Description | Low Current Preamplifier | |
| Manufacturers | Gennum Corporation | |
| Logo |  |
|
|
There is a preview and GK504 download ( pdf file ) link at the bottom of this page. Total 6 Pages | ||
Preview 1 page No Preview Available !
FEATURES
• designed to drive Class D integrated receivers
• adjustable peak clipper
• low current drain
• low noise and distortion
www.DataShee•t4Ulo.cwomexternal parts count
• two low noise preamplifiers
• transconductance output stage
• mid supply referenced output
• preamp A for Gain Trim or Telecoil
STANDARD PACKAGING
• 10 pin MICROpac
• 10 pin PLID®
• 10 pin SLT
• Chip ( 56 x 84 mils)
Au Bump
Low Current Preamplifier
with Output Limiting
GK504 - DATA SHEET
DESCRIPTION
The GK504 is Gennum’s proprietary low current preamplifier
designed to drive the Class D series receivers. It consists of
two independent single-ended, low noise inverting amplifiers,
a symmetrical peak clipping, mid-supply referenced,
transconductance output stage, and an on-chip microphone
decoupling resistor.
Blocks A and B typically have an open loop voltage gain of
53 dB, with the closed loop gain set by the ratio of the feedback
resistor to 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. It is
acceptable to DC-couple blocks A and B of the device,
however the third stage must be AC coupled in order to
maintain DC bias requirements.
The major advantage of the GK504 over other preamplifiers is
the electronic MPO adjustment. Since conventional MPO is
not possible in the class D receivers, it is provided electronically.
The maximum output swing is easily set using an R resistor.
MPO
The receiver output level is thus limited, preventing it from
exceeding the discomfort level.
VMIC 3
R MIC
AIN 2
A
B
RP1
C
RP2
4 VB
5C
OUT
1 10
A OUT BIN
U.S. Patent No.07/354,327
98
BOUT CIN
76
R MPO GND
BLOCK DIAGRAM
Revision Date; May 1998
Document No. 520 - 47 - 05
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]
|
| |
 
www.DataSheet4U.com
RMIC CS
3k92 0µ22
RMIC
1µ0 3
2A
RP1
BC
RP2
AC SOURCE
50Ω
1 10
98
7
R MPO
=0
6
100k
RGT
10k
100k 0µ1
RVC
All resistors in ohms, all capacitors in µF, unless otherwise stated.
This circuit as shown was used to generate the following graphs unless
otherwise stated.
Fig. 5 Characterization Circuit
VB =1.3 VDC
4
5
0µ1
+
BUFFER
-
RL
50k
AC
VOLTMETER
-5
-15
-25
-35
-45
-55
-65
-75
-85
-140
RVC = 100k
RVC = 33k
RVC = 10kΩ
RVC = 3.3kΩ
-120
-100
-80
-60
INPUT (dBV)
-40
Fig. 6 I/O for Various RVC Values
-20
-10
-14
-18
-22
-26
-30
-34
-38
-100
RMPO= 0
RMPO = 3.3k
RMPO = 10k
-80 -60 -40
INPUT (dBV)
Fig. 7 MPO for Various RMPO Values
-20
2
0 CIN = 0.22µ
-2
-4 CIN = 0.1µ
-6
-8
-10
-12
-14
-16
-18
-20
20
CIN = 0.047µ
CIN = 0.033µ
200 2K
FREQUENCY (Hz)
20K
Fig. 8 Frequency Response for Various CIN Values
10
9
8
7
6
5
4
3
2
1
0
-90
-86
-82 -78
-74 -70
INPUT (dBV)
Fig. 9 Distortion vs Input Level (RGT = RVC = 100k)
5 520 - 47 - 05
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for GK504 electronic component. |
| Information | Total 6 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ GK504.PDF Datasheet ] | |
Share Link :
Electronic Components Distributor
|
An electronic components distributor is a company that sources, stocks, and sells electronic components to manufacturers, engineers, and hobbyists. |
| SparkFun Electronics | Allied Electronics | DigiKey Electronics | Arrow Electronics |
| Mouser Electronics | Adafruit | Newark | Chip One Stop |
Featured Datasheets
| Part Number | Description | MFRS |
| GK504 | The function is Low Current Preamplifier. Gennum Corporation | |
| GK509 | The function is Class A Amplifier. Gennum |  |
Semiconductors commonly used in industry:
1N4148 |
BAW56 |
1N5400 |
NE555 | | ||
Quick jump to:
GK50
1N4
2N2
2SA
2SC
74H
BC
HCF
IRF
KA | ||