:- These are some books ,you should go through these.After that try to solve the last 10 years of GATE paper.you can also go through some test papers like G.K. publicatins,R.K. canodia
ELECTRONICS ENGINEERING
S.No.
SUBJECT
AUTHOR
1.
Electronic Devices and Circuits & Analog Electronics--
(i)
(ii)
(iii)
(iv)
(v)
(vi)
Integrated electronics : Analog and Digital Circuit and system
Microelectronic Circuits
Electronic Devices and Circuits
OP Amp and linear Integrated Circuit
SolidState electronic devices
Semiconductor devices
Jacob Millman & Christos C. Halkias
Sedra & Smith
J.B. Gupta
Ramakant A. Gayakwad
Streetman and Banerjee
S.M.Sze
2.
Communication System
(i)
(ii)
(iii)
(iv)
(v)
Communication System
An introduction to Analog and Digital Communication