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   Periodic Binary Bits Generator, Differential Waveform Outputs (PBGEND)       

Periodic Binary Bits Generator, Differential Waveform Outputs (PBGEND)

 

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Property

Description

Unit

Default

Range/Type

Bit_Pattern

Pattern of bits to generate during each period in binary format

None

0101

String

Period

Period of the generaged binary sequence in bits

None

1

(0, Inf)/Integer

NB

Total number of binary bits to generate

None

100

(0, Inf)/Integer

BR

Bit rate of the generated binary sequence

Hz

1000

(0, Inf)/Real

T

True output value

Volt

1

(-Inf,Inf)/Real

F

False output value

Volt

0

(-Inf,Inf)/Real

V0

Initial value

Volt

0

(-Inf,Inf)/Real

TS

Sampling time

Sec

1e-6

(0,Inf)/Real

TR

Rise time

Sec

0

[0,Inf)/Real

TF

Fall time

Sec

0

[0,Inf)/Real

DCD

Duty cycle distortion, fraction of UI

None

0

[0,1)/Real

TXRJ

Gaussian random transmit jitter

None

0

 

TXPJ

Periodic random transmit jitter

None

 

 

TXUJ

Uniform random transmit jitter

None

 

 

RANDOM_SEED

Seed for random jitter

None

None

[0,MAXINT)/Integer

Rout1

Output1 impedance

Ohm

0

[0,Inf)/Real

Rout2

Output2 impedance

Ohm

0

[0,Inf)/Real

Ports

Output1

Output1 signal (real)

Output2

Output2 signal (real)

Notes

This model outputs a periodic waveform to the first output defined by the user specified parame­ters. The second output is simply the negative of the first output.

This generated “positive” output waveform is a periodic waveform of T's and F's with a BR bit rate and a TS sampling period. The period of this bit sequence, in bits, is given by PERIOD and the bits generated during each period are specified by BIT_PATTERN in binary format. For example, if BIT_PATTERFN = 1010, PERIOD = 4 bits, BR = 10 bits/sec, TS = 50 ms, then output sequence will be (in samples) F/2F/2T/2T/2F/2F/2T/2T/2F/2F ... . Note that the resulting number of samples per bit in this case is 2 = 1/(TS*BR). Also note that the pattern always starts with the least signifi­cant bit of BIT_PATTERN. It is common that the parameters T and F are set to the default values of 1 and 0 respectively.

Netlist Form

PBGEND:NAME n1 n2 Bit_Pattern=val Period=val [NB=val] [BR=val] [T=val] [F=val]
+ [V0=val] [TS=val] [TR=val] [TF=val]
+ [DCD=val][TXRJ=val][[TXPJ=val][TXUJ=val][RANDOM_SEED=val]
+ [Rout1=val] [Rout2=val]

Netlist Example

PBGEND:1 1 2 Bit_Pattern=10 Period=6 NB=1024



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