Integrated circuit devices having strobe signal transmitters with enhanced drive characteristics
View Patent ↗An integrated circuit device includes a read strobe signal transmitter including a main output drive circuit and a victim output drive circuit having an output terminal electrically coupled to an output terminal of the main output drive circuit. The read strobe signal transmitter is configured to: (i) generate a periodic active read strobe signal during a read time interval, in response to a pair of periodic drive signals, which are 180° out-of-phase relative to each other during the read time interval, and (ii) generate a disabled read strobe signal at a fixed logic level during a non-read time interval, in response to an active victim control signal. The main output drive circuit is responsive to the pair of periodic drive signals during the read time interval, and the victim output drive circuit is responsive to the active victim control signal during the non-read time interval.
1. A semiconductor device comprising a transmitter transmitting a first read strobe signal and a second read strobe signal synchronized with data,
wherein the transmitter comprises:
a first main output drive circuit outputting the first read strobe signal toggled to falling and rising edges thereof, during a read operation in which the data is output;
a second main output drive circuit outputting the second read strobe signal toggled to rising and failing edges thereof, during the read operation;
a first victim output drive circuit outputting the first read strobe signal having logic high during a non-read operation; and
a second victim output drive circuit outputting the second read strobe signal having logic low during the non-read operation;
wherein the first victim output drive circuit comprises a first p-type metal-oxide-semiconductor (PMOS) transistor driving the first read strobe signal at a power supply voltage level in response to a first control signal;
wherein the second victim output drive circuit comprises a first n-type metal-oxide-semiconductor (NMOS) transistor driving the second read strobe signal at a ground voltage level in response to a second control signal; and
wherein the first read strobe signal and the second read strobe signal are complementary.
2. The semiconductor device according to claim 1 , wherein the first and second main output drive circuits are disabled during the non-read operation.
3. The semiconductor device according to claim 1 , wherein the first and second victim output drive circuits are disabled during the read operation.
4. The semiconductor device according to claim 1 , wherein the first main output drive circuit comprises:
a second p-type metal-oxide-semiconductor (PMOS) transistor driving the first read strobe signal at the power supply voltage level in response to a first drive signal; and
a second n-type metal-oxide-semiconductor (NMOS) transistor driving the first read strobe signal at the ground voltage level in response to a second drive signal.
5. The semiconductor device according to claim 4 , wherein, during the read operation, the first drive signal and the second drive signal have equal logic levels, and the first control signal has a logic high level.
6. The semiconductor device according to claim 4 , wherein, during the non-read operation, the first drive signal and the second drive signal have logic levels complementary to each other and the first control signal has a logic low level.
7. The semiconductor device according to claim 1 , wherein the second main output drive circuit comprises:
a second p-type metal-oxide-semiconductor (PMOS) transistor driving the second read strobe signal at the power supply voltage level in response to a first drive signal; and
a second n-type metal-oxide-semiconductor (NMOS) transistor driving the second read strobe signal at the ground voltage level in response to a second drive signal.
8. The semiconductor device according to claim 7 , wherein, during the read operation, the first drive signal and the second drive signal have equal logic levels, and the second control signal has a logic low level.
9. The semiconductor device according to claim 7 , wherein, during the non-read operation, the first drive signal and the second drive signal have logic levels complementary to each other, and the second control signal has a logic high level.
10. A semiconductor device comprising:
a first transmitter transmitting a read strobe signal synchronized with data; and
a second transmitter transmitting a complementary read strobe signal synchronized with the data and complementary to the read strobe signal,
wherein the first transmitter comprises:
a first main output drive circuit outputting the read strobe signal toggled to rising and falling edges thereof, during a read operation in which the data is output; and
a first victim output drive circuit outputting the read strobe signal having logic low during a non-read operation, and
the second transmitter comprises:
a second main output drive circuit outputting the complementary read strobe signal toggled to falling and rising edges thereof, during the read operation; and
a second victim output drive circuit outputting the complementary read strobe signal having logic high during the non-read operation;
wherein the first victim output drive circuit comprises an n-type metal-oxide-semiconductor (NMOS) transistor driving the read strobe signal at a ground voltage level in response to a first control signal; and
wherein the second victim output drive circuit comprises a p-type metal-oxide-semiconductor (PMOS) transistor driving the complementary read strobe signal at a power supply voltage level in response to a second control signal.
11. The semiconductor device according to claim 10 , wherein the first transmitter comprises:
the first main output drive circuit outputting the read strobe signal toggled to the rising and falling edges in response to first and second drive signals, during the read operation; and
the first victim output drive circuit outputting the read strobe signal having the logic low in response to an active first control signal, during the non-read operation.
12. The semiconductor device according to claim 10 , wherein the second transmitter comprises:
the second main output drive circuit outputting the complementary read strobe signal toggled to the falling and rising edges in response to third and fourth drive signals, during the read operation; and
the second victim output drive circuit outputting the complementary read strobe signal having the logic high in response to an active second control signal, during the non-read operation.
13. The semiconductor device according to claim 10 , wherein the semiconductor device comprises a memory device outputting the data with the toggling read strobe signal and complementary read strobe signal outside thereof.