Semiconductor circuit device having active and standby states
AssigneeRenesas Technology Corp.
InventorHideto Hidaka
Life of this patent
Estimating the term…
Abstract
A P channel MOS transistor and an N channel MOS transistor turned on/off in response to an input signal in an active state as well as an N channel MOS transistor connected between an output node and the N channel MOS transistor and turned on/off in response to a control signal are provided. The input signal is at the L level in a standby state. The control signal is at the L level in the standby state and at the H level in the active state. This suppresses the effect of hot carriers in the active state and decreases a subthreshold current in the standby state.
Claims10
A semiconductor circuit device, comprising:
- a main power supply line;
- n blocks (n:
- an integer indicating number) each having a sub power supply line and an internal circuit connected to said sub power supply line;
- a block selecting circuit disposed to selectively activate said n blocks;
- n switching elements each connected between said main power supply line and a sub power supply line in a corresponding block;
- and
- a control circuit disposed to turn on each of m switching elements (m:
- an integer indicating number), of said n switching elements, which include a switching element corresponding to a block to be activated by said block selecting circuit and thereafter turn off a switching element corresponding to a block other than the block to be activated by said block selecting circuit.
A semiconductor circuit device, comprising:
- a main power supply line
- n blocks (n:
- an integer indicating number) each having a sub power supply line and an internal circuit connected to said sub power supply line;
- a block selecting circuit disposed to selectively activate said n blocks;
- n first switching elements each connected between said main power supply line and a sub power supply line in a corresponding block;
- a first control circuit disposed to turn on a first switching element corresponding to a block to be activated by said block selecting circuit;
- n second switching elements each connected in parallel with a corresponding first switching element;
- and
- a second control circuit disposed to turn on each of m second switching elements (m:
- an integer indicating number), of said n second switching elements, which include a second switching element corresponding to a block to be activated by said block selecting circuit before activation of a block by said block selecting circuit.
A semiconductor circuit device, comprising:
- a main power supply line;
- a plurality of blocks each having a sub power supply line and an internal circuit connected to said sub power supply line;
- a block selecting circuit disposed to selectively activate said plurality of blocks;
- a plurality of switching elements corresponding to said plurality of blocks and each connected between said main power supply line and a corresponding block;
- and
- a control circuit disposed to successively turn on said plurality of switching elements before activation of a block by said block selecting circuit.
Dependencies are inferred from the claim text.