Improved performance of Injection-Locked QPSK Modulator Based on Ring VCO in 130 nm CMOS

ABSTARCT :-

A novel quadrature phase-shift keying (QPSK) modulator that employs injection locking for the phase modulation as well as the phase-locked clock generation is presented. By using the proposed clock gating by and gate on a ring voltage-controlled oscillator (VCO), total power consumption and delay is optimizing .The proposed QPSK modulator was fabricated in a 130 nm CMOS. For improve the performance of the circuit , we can use clock gating . 

 

INDEX TERMS—CMOS, injection locking, modulator, quadrature phase-shift keying (QPSK), ring voltage-controlled oscillator (VCO).

Video explanation 

 In the video we are describing firstly the steps of the tanner tool for remove the warning of S-edit . Then we show the base paper of the QPSK based RING VCO . We describe the circuit of the QPSK based Ring VCO . In the ring VCO circuit there was two phase Q phase and I phase . So we describe both the circuits . Then we design complete circuit in the tanner tool with I phase and Q phase circuit of the QPSK based Ring VCO . Now we describe the circuit of the Ring VCO in the tanner . Show the commands for open the circuit in T spice . We use .power command for show the output power . Now we describe the output waveform of the W edit . then we also describe the power of the paper design QPSK based Ring VCO circuit . 

Now we apply Clock gating for improve the performance of the circuit . We apply the clock gating at the place of the clock . Clock gating will be able to reduce the power consumption of the QPSK based Ring VCO circuit . We explain the circuit of the QPSK based Ring VCO circuit by clock gating  . Then we show the output waveform of the QPSK based ring VCO by clock gating . Output waveform are showing for out0 and out270 . Then we show the power consumption of the proposed clock gating of QPSK based Ring VCO . From the power results we can see that power is reducing from the base paper circuit . 

For see the video :-

 

 

For Buy this project contact us at :- goelrahulgoel@gmail.com