BGC405

High Frequency Products

5

Edition A13, 06/00

Typical Application

Remarks:

1)

To provide low frequency stability C2 should be 10 times C3.

2)

Be aware that also coupling capacitors determine the switching times.

3)

The collector current at Q1 can be estimated by Ic=0.6V / Rx[

Ω].

4)

Place C2 as close to the device as possible.

D1

D2

R1 (47k)

Q2

R2 (500R)

R3

10k

R4 (2k7)

Q1

Vc,8

Vb,3

GND,7,2

RFin,1

RFout,6

Vr,5

Vcc,4

on

off

C2, 1nF

L1,100nH

C3, 100pF

Rx

C4,150pF C5,100nF

Rx = 82Ohm for Icc=7.2mA

Figure 1. Typical Application and Internal Circuit