Datasheet Details
| Part number | SKY65120 |
|---|---|
| Manufacturer | Skyworks Solutions |
| File Size | 1.20 MB |
| Description | WCDMA PA Bias Method |
| Download | SKY65120 Download (PDF) |
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| Part number | SKY65120 |
|---|---|
| Manufacturer | Skyworks Solutions |
| File Size | 1.20 MB |
| Description | WCDMA PA Bias Method |
| Download | SKY65120 Download (PDF) |
|
|
|
The active circuit is designed to maintain a constant supply current to the base of its respective transistor as supply voltage and temperature is changed.
Each active bias circuit consists of three HBT transistors and three resistors, connected as shown in Figure 2 below.
VC_BIAS R1 Q1 Q2 R2 I_Supply (to Base of PA) Q3 R3 VREF RREF (On PCB) Active Bias 1 Active Bias 2 RF In Input Match Stage 1 VCC1 (5 V) Interstage Match Stage 2 VCC2 (5 V) Output Match RF Out Figure 2.
application note SKY65120: WCDMA PA Bias Method For Lower Junction Temperature Introduction This application note describes how SKY65120 may be used with reduced bias control to obtain better thermal performance.
It is especially useful for customers who may not have a suitable heat sink available directly below the PA module.
To achieve high gain (>23 dB), the SKY65120 consists of two stages of amplification.
| Part Number | Description |
|---|---|
| SKY65120 | 2110-2170 MHz High Linearity / 2W Power Amplifier |
| SKY65120-21 | 2110-2170 MHz High Linearity / 2W Power Amplifier |
| SKY65111-348LF | ISM 600-1100 MHz Band 2 Watt InGaP HBT Power Amplifier |
| SKY65112-84LF | Linear Power Amplifier Driver |
| SKY65113-84LF | Linear Power Amplifier Driver |
| SKY65116 | 390-500 MHz Linear Power Amplifier |
| SKY65119 | 700-800 MHz Linear Power Amplifier |
| SKY65131 | WLAN Power Amplifier Module |
| SKY65132 | WLAN Power Amplifier Module |
| SKY65135 | WLAN Power Amplifier |