New PDF release: Advances in Solid State Circuits Technologies


By P. Chu

ISBN-10: 9533070862

ISBN-13: 9789533070865

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Extra info for Advances in Solid State Circuits Technologies

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In addition to it, since the storage capacity of a holographicmemory is extremely high, numerous configuration contexts can be stored in a holographic memory. Therefore, the ORGA architecture can dynamically implement single instruction set computers. 3. Dynamic ORGA architecture A configuration context is optically applied in ORGAs. In ORGA-VLSIs, a certain detection circuit must be used in addition to a programmable gate array. The detection circuit is called 48 Advances in Solid State Circuits Technologies an optical reconfiguration circuit.

The proposed transconductor Considering that the large gain is achieved and is able to keep transistors M1 and M2 in triode region, the drain current of M1 and M2 is given by ⎡ V2 ⎤ I out 1 = β 1 ⎢(VGS 1 − VT 1 )VDS 1 − DS 1 ⎥ 2 ⎦ ⎣ (30) ⎡ V2 ⎤ I out 2 = β 2 ⎢(VGS 2 − VT 2 )VDS 2 − DS 2 ⎥ 2 ⎦ ⎣ (31) The transfer characteristic is given by 36 Advances in Solid State Circuits Technologies I out = I out 1 − I out 2 = β 1VDS 1 (Vin 1 − Vin 2 ) (32) , where β1 = β2, VT1 =VT2, and VDS1 = VDS2. Assuming that current I9 flows from M11 through M9 and MOS M9 is in saturation region, VDS1 can be found in (33) VGS 3 + VDS 1 = VDS 7 VC − VT 7 = VDS 7 => VGS 3 + VDS 1 = VC − VT 7 VDS 1 = VC − VT 7 − VGS 3 (33) I out = β 1VDS 1 (Vin 1 − Vin 2 ) = β 1 (VC − VT 7 − VGS 3 )(Vin 1 − Vin 2 ) (34) According to (32) The transconductance Gm is Gm = β 1 (VC − VT 7 − VGS 3 ) (35) From (35), the transconductance can be tuned by control voltage VC To keep M1 and M2 in triode region, the relation (36) needs to be satisfied.

2. ORGA architecture Fig. 2. Overall construction of an optically reconfigurable gate array (ORGA). An overview of an Optically Reconfigurable Gate Array (ORGA) is portrayed in Fig. 2. An ORGA comprises a gate-array VLSI (ORGA-VLSI), a holographic memory, and a laser diode array. The holographic memory stores reconfiguration contexts. A laser array is mounted on the top of the holographicmemory for use in addressing the reconfiguration contexts in the holographic memory. One laser corresponds to a configuration context.

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Advances in Solid State Circuits Technologies by P. Chu

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