Voltage Controlled Resistor Verilog A
This is defined in verilog a using a branch contribution as follows.
Voltage controlled resistor verilog a. Here we show how to make a voltage controlled oscillator. Verilog files constants vams disciplines vams fbh hbt 2 2a va hicuml2v2p11 va mod amp va hicuml2v2p22 va log amp va 145 7 147 8 verilog files constants vams disciplines vams mux2to1 va mux4to1 va mux8to1 va dls nto1 va dls 1ton va andor4x2 va andor4x3 va andor4x4 va dmux2to4 va dmux3to8 va dmux4to16 va ha1b va. Grounded vcrs the more common and les. I p n represents the current flowing from port p to port n and v p n represents the potential difference measured between nodes p and n.
There are both floating voltage controlled resistors and grounded floating resistors. The jfet and the mosfet. A voltage controlled resistor is a three terminal active device with one input port and two output ports. A voltage controlled oscillator.
Verilog a may be used to create signal sources. This defines the current voltage relationship that the simulator must maintain on the nodes p and n. Two types of fets are often used. Here we show how to make a voltage controlled oscillator.
In this example we define a simple resistor. Vcrs are most often built with field effect transistors. The input port voltage controls the value of the resistor between the output ports. A resistor is a device whose current is proportional to the voltage difference between its terminals.
The verilog a source code below demonstrates a pll circuit. The vco and phase detector are defined as. Voltage controlled current source only verilog a resistor model for r o. A voltage controlled oscillator verilog a may be used to create signal sources.
Voltage controlled oscillator module vco in out. A read is counted each time someone views a publication summary such as the title abstract and list of authors. For compact model implementation purposes in simulators based on the modified nodal formulation it is more convenient to have models that are composed solely of voltage controlled current sources rather than having to conditionally include a current controlled voltage source or node collapse. Floating vcrs can be placed between two passive or active components.
We present a verilog a implementation of a resistor model that uses only such sources yet can handle small and zero valued resistances. I p n v p n resistance. The pll consists of a phase detector an amplifier and a voltage controlled oscillator.