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參數(shù)資料
| 型號(hào)： | MC13142D |
| 廠商： | MOTOROLA INC |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | Fan cover for JPS250 12, 15, 48V, PQ41, PQ46, PQ47 models RoHS Compliant: Yes |
| 中文描述： | TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, PDSO16 |
| 封裝： | PLASTIC, SO-16 |
| 文件頁數(shù)： | 3/16頁 |
| 文件大?。?/td> | 266K |
| 代理商： | MC13142D |
MC13142
3
MOTOROLA RF/IF DEVICE DATA
CIRCUIT DESCRIPTION
General
The MC13142 is a low power LNA, double–balanced
Mixer, and VCO. This device is designated for use as the
frontend section in analog and digital FM systems such as
Digital European Cordless Telephone (DECT), PHS, PCS,
Cellular, UHF and 800 MHz Special Mobile Radio (SMR),
UHF Family Radio Services and 902 to 928 MHz cordless
telephones. It features a mixer linearity control to preset or
auto program the mixer dynamic range, an enable function
and a wideband IF so the IC may be used either as a down
converter or an up converter. Further details are covered in
the Pin by Pin Description which shows the equivalent
internal circuit and external circuit requirements.
Current Regulation/Enable
Temperature compensating voltage independent current
regulators are controlled by the enable function in which
“high” powers up the IC.
Low Noise Amplifier (LNA)
The LNA is internally biased at low supply current
(approximately 2.0 mA emitter current) for optimal noise
figure and gain. The LNA output is biased internally with a
600
resistor to VCC. Input and output matching may be
achieved at various frequencies using few external
components. Matching the LNA for Maximum stable gain
(MSG) yields noise performance within a few tenths of a dB
of the minimum noise figure.
Mixer
The mixer is a double–balanced four quadrant multiplier
biased class AB allowing for programmable linearity control
via an external current source. An input third order intercept
point of 20 dBm may be achieved. All 3 ports of the mixer are
designed to work up to 1.8 GHz. The mixer has a 50
single–ended RF input and open collector differential IF
outputs. An on–board Local Oscillator transistor has the
emitter, base and collector pinned out to implement a low
phase noise VCO in various configurations. Additionally, a
buffered LO output is provided for operation with a frequency
synthesizer. The linear gain of the mixer is approximately
0 dB with a SSB noise figure of 12 dB in the IF output circuit
configuration shown in the application example.
Local Oscillator
The on–chip transistor operates with coaxial transmission
line or LC resonant elements to over 2.0 GHz. Biasing is
done with a temperature compensated current source in the
emitter and a collector to base internal resistor of 7.6 k
;
however, an RFC from VCC to base is recommended. The
application circuit shows a voltage controlled Clapp oscillator
operating at center frequency of 975 MHz.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC13142 | LOW POWER DC - 1.8 GHz LNA, MIXER and VCO |
| MC13143D | ULTRA LOW POWER DC - 2.4 GHz LINEAR MIXER |
| MC13143 | ULTRA LOW POWER DC - 2.4 GHz LINEAR MIXER |
| MC13144D | VHF - 2.0 GHz LOW NOISE AMPLIFIER WITH PROGRAMMABLE BIAS |
| MC13144 | VHF - 2.0 GHz LOW NOISE AMPLIFIER WITH PROGRAMMABLE BIAS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC13143 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:ULTRA LOW POWER DC - 2.4 GHz LINEAR MIXER |
| MC13143D | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:ULTRA LOW POWER DC - 2.4 GHz LINEAR MIXER |
| MC13144 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:VHF - 2.0 GHz LOW NOISE AMPLIFIER WITH PROGRAMMABLE BIAS |
| MC13144D | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:VHF - 2.0 GHz LOW NOISE AMPLIFIER WITH PROGRAMMABLE BIAS |
| MC13145 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:UHF WIDEBAND RECEIVER SUBSYSTEM (LNA, Mixer, VCO, Prescalar, IF Subsystem, Coilless Detector) |
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