Znbg3118, New prod uc t, Local oscillator configurations – Diodes ZNBG3118 User Manual

Page 6: A product line of diodes incorporated

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ZNBG3118

ZNBG3118

Document number: DS32049 Rev. 2 - 2

6 of 10

www.diodes.com

February 2010

© Diodes Incorporated

NEW PROD

UC

T

A Product Line of

Diodes Incorporated

MIMIC local oscillators
Referring to Figure 3 wiring pin LOV to ground will force LB and HB to switch between -2.5V (disabled) and 0V (enabled). Note
that Vcc(max) should not exceed 6.0V when using this configuration.

Logic enabled PLL local oscillators
Referring to Figure 4 connecting the LOV pin to Vcc will pull the LB and HB to V

CC

when enabled and 0V when disabled. Using the

same supply voltage for the ZNBG3118 and the PLL local oscillator block, the LB and HB outputs will provide a suitable logic signal
of up to 100uA to drive the LO select pin of a PLL system.

Local Oscillator Configurations























Figure 2 Applications circuit for the ZNBG3118 using Bi-polar oscillators




























Figure 3 Applications circuit for the ZNBG3118 using MIMIC local oscillators






Vcc

CNB 47nF

CSUB 47nF

RLV1

LNB Downf eed

RPOL
10k

CFIN

330pF

Gnd

ZNBG3118

Csu

b

Cnb1

Cnb2

Rca

l

G2

D3

G3

D1

2

LB

G1

HB

Fi

n

Vpol

Vcc

Lov

RHB1

CHB

RHB2

9.75GHz Local Osc.

10.6GHz Local Osc.

Q1

RLB1

CLB

RLB2

Q2

RLV2

RCAL 39k

Vcc

CNB 47nF

CSUB 47nF

LNB Downf eed

RPOL

10k

CFIN

330pF

Gnd

ZNBG3118

Cs

u

b

Cnb1

Cnb2

Rc

a

l

G2

D3

G3

D1

2

LB

G1

HB

Fi

n

Vp

ol

Vcc

Lov

RHB1

CLB

RLB1

CHB

RCAL 39k

G2

G1

Local

Osc.
MMIC

RHB2
240k

RLB2
240k

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