參數(shù)資料
型號(hào): FPD2250DFN
英文描述: LOW NOISE, HIGH LINEARITY PACKAGED PHEMTT
中文描述: 低噪聲,高線性包裝的PHEMTT
文件頁(yè)數(shù): 3/5頁(yè)
文件大?。?/td> 236K
代理商: FPD2250DFN
FPD2250DFN
L
OW
N
OISE
,
H
IGH
L
INEARITY
P
ACKAGED
PHEMTT
BIASING GUIDELINES
Active bias circuits provide good performance stabilization over variations of operating
temperature, but require a larger number of components compared to self-bias or dual-biased.
Such circuits should include provisions to ensure that Gate bias is applied before Drain bias,
otherwise the pHEMT may be induced to self-oscillate. Contact your Sales Representative for
additional information.
Dual-bias circuits are relatively simple to implement, but will require a regulated negative
voltage supply for depletion-mode devices such as the FPD2250DFN.
For standard Class A operation, a 50% of I
DSS
bias point is recommended. A small amount of
RF gain expansion prior to the onset of compression is normal for this operating point. Note that
pHEMTs, since they are “quasi- E/D mode” devices, exhibit Class AB traits when operated at
50% of I
DSS
. To achieve a larger separation between P
1dB
and IP3, an operating point in the 25%
to 33% of I
DSS
range is suggested. Such Class AB operation will not degrade the IP3
performance.
PACKAGE OUTLINE
(dimensions in mm)
All information and specifications subject to change without notice.
Phone:
+1 408 850-5790
Fax:
+1 408 850-5766
http://
www.filtronic.co.uk/semis.com
Revised: 11
/14/05
Email:
sales@filcsi.com
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