[IEEE The 3rd International IEEE-NEWCAS Conference, 2005. - Quebec City, Canada (19-22 June, 2005)]...

4
v + M3 M4 in v - in v+ o v- o M1 M2 M5 M6 V b

Transcript of [IEEE The 3rd International IEEE-NEWCAS Conference, 2005. - Quebec City, Canada (19-22 June, 2005)]...

Page 1: [IEEE The 3rd International IEEE-NEWCAS Conference, 2005. - Quebec City, Canada (19-22 June, 2005)] The 3rd International IEEE-NEWCAS Conference, 2005. - A Fully Differential VCO Cell

v +

M3 M4

in v -in

v +ov -o

M1 M2M5 M6

Vb

Page 2: [IEEE The 3rd International IEEE-NEWCAS Conference, 2005. - Quebec City, Canada (19-22 June, 2005)] The 3rd International IEEE-NEWCAS Conference, 2005. - A Fully Differential VCO Cell

0 100 200 300 400−0.5

0

0.5

1

1.5

2

Time [ps]

Out

put v

olta

ge [V

]

Wp=2 μm

Wp=10 μm

0 100 200 300 400−0.5

0

0.5

1

1.5

2

Time [ps]

Out

put v

olta

ge [V

]

Wp=2 μm

Wp=10 μm

0 100 200 300 4000

0.5

1

1.5

2

2.5

Time [ps]

Vol

tage

[V]

L=5 nH

L=1 nH

0 100 200 300 400−0.2

0

0.2

0.4

0.6

0.8

1

1.2

1.4

Time [ps]

Out

put v

olta

ge [V

] W=2 μm

W=8 μm

v +in v -in

v +ov -o

M1 M2M5 M6

R

R

L

Page 3: [IEEE The 3rd International IEEE-NEWCAS Conference, 2005. - Quebec City, Canada (19-22 June, 2005)] The 3rd International IEEE-NEWCAS Conference, 2005. - A Fully Differential VCO Cell

10−1

100

101

102

−300

−200

−100

0

100

200

300

400

500

Frequency [GHz]

Impe

danc

e [Ω

]

5μm

25μm

5μm

25μmIm(Z

in)

Re(Zin

)

10−1

100

101

102

−300

−200

−100

0

100

200

300

400

500

Frequency [GHz]

Impe

danc

e [Ω

] 0.5 kΩ

2.5 kΩ

2.5 kΩ

0.5 kΩ

Re(Zin

)

Im(Zin

)

v +

M3 M4

in v -in

v +ov -o

M1 M2M5 M6

Vb Vb

M7 M8

0 100 200 300 400 5000

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

Time [ps]

Out

put [

V]

Vc=0

Vc=0.4V

Vc=0.8V

Vc=1.2V

Page 4: [IEEE The 3rd International IEEE-NEWCAS Conference, 2005. - Quebec City, Canada (19-22 June, 2005)] The 3rd International IEEE-NEWCAS Conference, 2005. - A Fully Differential VCO Cell

V - VDD T

V - 2VDD T

M5 in saturation & Vo- drops linearly

M5 in triode & Vo- drops exponentially

Vin+

Vo-

t

t

VT

VT

Vo

Vo+

M1 in triode

V - VDD T

0 100 200 300 4000

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

Time [ps]

Out

put v

olta

ge [V

]

VDD

=1.7 V

VDD

=1.9 V

0 100 200 300 400−0.5

0

0.5

1

1.5

2

Time [ps]

Out

put v

olta

ge [V

]

VDD

=1.9 V

VDD

=1.7 V

0 100 200 300 4000

0.5

1

1.5

2

2.5

Time [ps]

Out

put v

olta

ge [V

]

VDD

=1.9 V

VDD

=1.7 V

0 100 200 300 4000.2

0.4

0.6

0.8

1

1.2

1.4

1.6

Time [ps]

Out

put v

olta

ge [V

]

VDD

=1.9 V

VDD

=1.7 V